{"id":3107,"date":"2026-05-04T11:22:21","date_gmt":"2026-05-04T10:22:21","guid":{"rendered":"https:\/\/www.onlinelearningsystem.net\/xyz\/?page_id=3107"},"modified":"2026-10-12T19:58:06","modified_gmt":"2026-10-12T18:58:06","slug":"revision-notes","status":"publish","type":"page","link":"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/","title":{"rendered":"Revision Notes"},"content":{"rendered":"\n\n<section class=\"ols-revision-notes-home\">\n\n  <style>\n    @import url('https:\/\/fonts.googleapis.com\/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');\n\n    .ols-revision-notes-home,\n    .ols-revision-notes-home * {\n      box-sizing: border-box;\n    }\n\n    .ols-revision-notes-home {\n      --ols-navy: #1C244B;\n      --ols-navy-2: #253064;\n      --ols-blue: #467FF7;\n      --ols-soft-blue: #EEF4FF;\n      --ols-green: #3B6D11;\n      --ols-soft-green: #eef8e9;\n      --ols-purple: #6f3d96;\n      --ols-soft-purple: #f7f0ff;\n      --ols-ink: #071845;\n      --ols-muted: #4b5575;\n      --ols-border: rgba(28, 36, 75, 0.12);\n      --ols-shadow: 0 18px 45px rgba(28, 36, 75, 0.12);\n      --ols-shadow-soft: 0 10px 28px rgba(28, 36, 75, 0.09);\n      --ols-container: 1180px;\n      font-family: \"Poppins\", Arial, sans-serif;\n      color: var(--ols-ink);\n      background: #ffffff;\n      overflow: hidden;\n    }\n\n    .ols-revision-notes-home a {\n      color: inherit;\n      text-decoration: none;\n    }\n\n    .ols-rn-container {\n      width: min(var(--ols-container), calc(100% - 40px));\n      margin: 0 auto;\n    }\n\n    \/* =========================================================\n       BREADCRUMB\n    ========================================================= *\/\n\n    .ols-rn-breadcrumb-bar {\n      padding: 16px 0 0;\n      background: #ffffff;\n    }\n\n    .ols-rn-breadcrumb {\n      display: flex;\n      flex-wrap: wrap;\n      gap: 6px;\n      font-size: 13px;\n      color: var(--ols-muted);\n      font-weight: 500;\n    }\n\n    .ols-rn-breadcrumb span {\n      color: var(--ols-navy);\n      font-weight: 700;\n    }\n\n    \/* =========================================================\n       HERO\n    ========================================================= *\/\n\n    .ols-rn-hero {\n      padding: 38px 0 34px;\n      background:\n        radial-gradient(circle at top center, rgba(70, 127, 247, 0.07), transparent 40%),\n        linear-gradient(180deg, #f7f9fd 0%, #ffffff 100%);\n    }\n\n    .ols-rn-hero-inner {\n      text-align: center;\n      max-width: 920px;\n      margin: 0 auto;\n    }\n\n    .ols-rn-eyebrow {\n      display: inline-flex;\n      align-items: center;\n      gap: 9px;\n      padding: 8px 16px;\n      border-radius: 999px;\n      background: #ffffff;\n      border: 1px solid rgba(70, 127, 247, 0.20);\n      color: var(--ols-blue);\n      font-size: 13px;\n      font-weight: 600;\n      box-shadow: 0 6px 18px rgba(28, 36, 75, 0.06);\n      margin-bottom: 18px;\n    }\n\n    .ols-rn-eyebrow::before {\n      content: \"\";\n      width: 7px;\n      height: 7px;\n      border-radius: 50%;\n      background: var(--ols-blue);\n      box-shadow: 0 0 0 4px rgba(70, 127, 247, 0.14);\n    }\n\n    .ols-rn-hero h1 {\n      margin: 0 0 14px;\n      color: var(--ols-navy);\n      font-size: clamp(42px, 5.5vw, 74px);\n      font-weight: 800;\n      line-height: 1.05;\n      letter-spacing: -0.045em;\n      text-shadow: -9px 0 9px rgba(28, 36, 75, 0.08);\n    }\n\n    .ols-rn-hero p {\n      margin: 0 auto;\n      max-width: 780px;\n      color: #11316b;\n      font-size: clamp(17px, 1.7vw, 21px);\n      line-height: 1.65;\n      font-weight: 300;\n    }\n\n    .ols-rn-free-pill-row {\n      display: flex;\n      flex-wrap: wrap;\n      justify-content: center;\n      gap: 10px;\n      margin-top: 22px;\n    }\n\n    .ols-rn-free-pill {\n      display: inline-flex;\n      align-items: center;\n      gap: 7px;\n      padding: 8px 15px;\n      border-radius: 999px;\n      background: #ffffff;\n      border: 1px solid rgba(28, 36, 75, 0.12);\n      color: var(--ols-navy);\n      font-size: 13px;\n      font-weight: 700;\n      box-shadow: 0 6px 18px rgba(28, 36, 75, 0.05);\n    }\n\n    .ols-rn-free-pill::before {\n      content: \"\";\n      width: 7px;\n      height: 7px;\n      border-radius: 50%;\n      background: var(--ols-blue);\n    }\n\n    \/* =========================================================\n       SUBJECT CARDS\n    ========================================================= *\/\n\n    .ols-rn-subjects {\n      padding: 18px 0 42px;\n      background: #ffffff;\n    }\n\n    .ols-rn-subject-grid {\n      min-height: 40vh;\n      display: grid;\n      grid-template-columns: repeat(4, minmax(0, 1fr));\n      gap: 20px;\n      align-items: stretch;\n    }\n\n    .ols-rn-subject-card {\n      position: relative;\n      display: flex;\n      flex-direction: column;\n      min-height: 380px;\n      background: #ffffff;\n      border: 2px solid var(--ols-border);\n      border-radius: 30px;\n      overflow: hidden;\n      box-shadow: var(--ols-shadow-soft);\n      color: var(--ols-navy);\n      transition:\n        transform 0.30s cubic-bezier(0.34, 1.56, 0.64, 1),\n        box-shadow 0.30s ease,\n        border-color 0.30s ease;\n    }\n\n    .ols-rn-subject-card--available:hover {\n      transform: translateY(-12px) scale(1.018);\n      box-shadow: 0 32px 64px rgba(28, 36, 75, 0.18);\n    }\n\n    .ols-rn-subject-card--locked {\n      cursor: default;\n    }\n\n    .ols-rn-subject-card--biology {\n      border-color: rgba(59, 109, 17, 0.34);\n    }\n\n    .ols-rn-subject-card--chemistry {\n      border-color: rgba(70, 127, 247, 0.42);\n    }\n\n    .ols-rn-subject-card--physics {\n      border-color: rgba(111, 61, 150, 0.34);\n    }\n\n    .ols-rn-subject-card--biology:hover {\n      border-color: rgba(59, 109, 17, 0.58);\n    }\n\n    .ols-rn-subject-card--chemistry:hover {\n      border-color: rgba(70, 127, 247, 0.72);\n    }\n\n    .ols-rn-subject-card--physics:hover {\n      border-color: rgba(111, 61, 150, 0.58);\n    }\n\n    .ols-rn-card-image {\n      position: relative;\n      min-height: 42%;\n      display: grid;\n      place-items: center;\n      padding: 18px;\n      overflow: hidden;\n      border-bottom: 1px solid rgba(28, 36, 75, 0.10);\n    }\n\n    .ols-rn-subject-card--biology .ols-rn-card-image {\n      background:\n        radial-gradient(circle at top right, rgba(59, 109, 17, 0.16), transparent 36%),\n        linear-gradient(135deg, #ffffff, var(--ols-soft-green));\n    }\n\n    .ols-rn-subject-card--chemistry .ols-rn-card-image {\n      background:\n        radial-gradient(circle at top right, rgba(70, 127, 247, 0.18), transparent 36%),\n        linear-gradient(135deg, #ffffff, var(--ols-soft-blue));\n    }\n\n    .ols-rn-subject-card--physics .ols-rn-card-image {\n      background:\n        radial-gradient(circle at top right, rgba(111, 61, 150, 0.16), transparent 36%),\n        linear-gradient(135deg, #ffffff, var(--ols-soft-purple));\n    }\n\n    .ols-rn-subject-card--gcse {\n      border-color: rgba(245, 158, 11, 0.38);\n    }\n\n    .ols-rn-subject-card--gcse:hover {\n      border-color: rgba(245, 158, 11, 0.64);\n    }\n\n    .ols-rn-subject-card--gcse .ols-rn-card-image {\n      background:\n        radial-gradient(circle at top right, rgba(245, 158, 11, 0.18), transparent 38%),\n        linear-gradient(135deg, #ffffff, #fff7ed);\n    }\n\n    .ols-rn-chem-visual {\n      position: relative;\n      width: 100%;\n      min-height: 172px;\n      border-radius: 24px;\n      overflow: hidden;\n      background:\n        radial-gradient(circle at 20% 22%, rgba(255,255,255,0.92), transparent 12%),\n        radial-gradient(circle at 78% 18%, rgba(255,255,255,0.74), transparent 14%),\n        linear-gradient(135deg, rgba(255,255,255,0.96), rgba(255,255,255,0.52));\n      border: 1px solid rgba(28, 36, 75, 0.10);\n      box-shadow: inset 0 0 0 1px rgba(255,255,255,0.55), 0 16px 34px rgba(28,36,75,0.08);\n    }\n\n    .ols-rn-chem-visual::before,\n    .ols-rn-chem-visual::after {\n      content: \"\";\n      position: absolute;\n      border-radius: 50%;\n      pointer-events: none;\n    }\n\n    .ols-rn-chem-visual::before {\n      width: 118px;\n      height: 118px;\n      left: -34px;\n      bottom: -36px;\n      background: rgba(70,127,247,0.13);\n    }\n\n    .ols-rn-chem-visual::after {\n      width: 92px;\n      height: 92px;\n      right: -24px;\n      top: -20px;\n      background: rgba(28,36,75,0.08);\n    }\n\n    .ols-rn-chem-orbit {\n      position: absolute;\n      left: 50%;\n      top: 50%;\n      width: 112px;\n      height: 112px;\n      border: 2px solid currentColor;\n      border-radius: 50%;\n      opacity: 0.22;\n      transform: translate(-50%, -50%) rotate(var(--orbit-rotate, 0deg)) scaleX(1.42);\n    }\n\n    .ols-rn-chem-core {\n      position: absolute;\n      left: 50%;\n      top: 50%;\n      width: 24px;\n      height: 24px;\n      border-radius: 50%;\n      background: currentColor;\n      transform: translate(-50%, -50%);\n      box-shadow: 0 0 0 10px rgba(255,255,255,0.56), 0 18px 30px rgba(28,36,75,0.14);\n    }\n\n    .ols-rn-chem-node {\n      position: absolute;\n      width: 14px;\n      height: 14px;\n      border-radius: 50%;\n      background: currentColor;\n      box-shadow: 0 0 0 6px rgba(255,255,255,0.58), 0 10px 20px rgba(28,36,75,0.10);\n    }\n\n    .ols-rn-chem-node--one { left: 28%; top: 34%; }\n    .ols-rn-chem-node--two { right: 25%; top: 38%; }\n    .ols-rn-chem-node--three { left: 45%; bottom: 22%; }\n\n    .ols-rn-chem-bond {\n      position: absolute;\n      height: 3px;\n      border-radius: 999px;\n      background: currentColor;\n      opacity: 0.20;\n      transform-origin: left center;\n    }\n\n    .ols-rn-chem-bond--one { width: 74px; left: 33%; top: 40%; transform: rotate(7deg); }\n    .ols-rn-chem-bond--two { width: 64px; left: 52%; top: 48%; transform: rotate(116deg); }\n    .ols-rn-chem-bond--three { width: 60px; left: 33%; top: 50%; transform: rotate(63deg); }\n\n    .ols-rn-chem-level {\n      position: absolute;\n      left: 16px;\n      bottom: 14px;\n      z-index: 2;\n      padding: 6px 10px;\n      border-radius: 999px;\n      background: rgba(255,255,255,0.76);\n      border: 1px solid rgba(28,36,75,0.10);\n      color: var(--ols-navy);\n      font-size: 11px;\n      font-weight: 800;\n      letter-spacing: 0.03em;\n      text-transform: uppercase;\n    }\n\n    .ols-rn-chem-visual--gcse { color: #f59e0b; }\n    .ols-rn-chem-visual--alevel { color: var(--ols-blue); }\n    .ols-rn-chem-visual--undergrad { color: var(--ols-green); }\n    .ols-rn-chem-visual--masters { color: var(--ols-purple); }\n\n\n    \/* Unique CSS-only card visuals *\/\n    .ols-rn-chem-level {\n      font-size: 10px;\n      padding: 5px 9px;\n      max-width: calc(100% - 28px);\n      white-space: nowrap;\n      letter-spacing: 0.015em;\n    }\n\n    .ols-rn-chem-visual--undergrad .ols-rn-chem-level {\n      font-size: 9px;\n      left: 12px;\n      padding: 5px 8px;\n    }\n\n    .ols-rn-chem-visual--gcse {\n      background:\n        radial-gradient(circle at 20% 25%, rgba(245,158,11,0.14), transparent 17%),\n        radial-gradient(circle at 78% 22%, rgba(245,158,11,0.10), transparent 17%),\n        linear-gradient(135deg, rgba(255,255,255,0.98), rgba(255,247,237,0.72));\n    }\n\n    .ols-rn-chem-visual--gcse .ols-rn-chem-orbit {\n      width: 118px;\n      height: 118px;\n      opacity: 0.24;\n      border-width: 2px;\n    }\n\n    .ols-rn-chem-visual--alevel {\n      background:\n        radial-gradient(circle at 28% 68%, rgba(70,127,247,0.14), transparent 18%),\n        radial-gradient(circle at 70% 28%, rgba(70,127,247,0.10), transparent 20%),\n        linear-gradient(135deg, rgba(255,255,255,0.98), rgba(238,244,255,0.76));\n    }\n\n    .ols-rn-chem-visual--alevel .ols-rn-chem-orbit {\n      display: none;\n    }\n\n    .ols-rn-chem-visual--alevel .ols-rn-chem-core {\n      width: 30px;\n      height: 30px;\n      left: 26%;\n      top: 45%;\n      box-shadow: 0 0 0 9px rgba(255,255,255,0.62), 0 18px 30px rgba(28,36,75,0.13);\n    }\n\n    .ols-rn-chem-visual--alevel .ols-rn-chem-node--one { left: 48%; top: 29%; width: 20px; height: 20px; }\n    .ols-rn-chem-visual--alevel .ols-rn-chem-node--two { right: 17%; top: 49%; width: 18px; height: 18px; }\n    .ols-rn-chem-visual--alevel .ols-rn-chem-node--three { left: 47%; bottom: 18%; width: 17px; height: 17px; }\n    .ols-rn-chem-visual--alevel .ols-rn-chem-bond--one { width: 72px; left: 31%; top: 40%; transform: rotate(-24deg); opacity: 0.24; }\n    .ols-rn-chem-visual--alevel .ols-rn-chem-bond--two { width: 70px; left: 53%; top: 43%; transform: rotate(28deg); opacity: 0.24; }\n    .ols-rn-chem-visual--alevel .ols-rn-chem-bond--three { width: 78px; left: 31%; top: 54%; transform: rotate(24deg); opacity: 0.20; }\n\n    .ols-rn-chem-visual--undergrad {\n      background:\n        radial-gradient(circle at 24% 24%, rgba(59,109,17,0.12), transparent 17%),\n        radial-gradient(circle at 76% 72%, rgba(59,109,17,0.10), transparent 18%),\n        linear-gradient(135deg, rgba(255,255,255,0.98), rgba(238,248,233,0.78));\n    }\n\n    .ols-rn-chem-visual--undergrad::before {\n      left: 50%;\n      top: 36%;\n      width: 98px;\n      height: 112px;\n      transform: translateX(-50%);\n      border-radius: 16px 16px 36px 36px;\n      background:\n        linear-gradient(180deg, rgba(255,255,255,0.70) 0 34%, rgba(59,109,17,0.13) 35% 100%);\n      border: 3px solid rgba(59,109,17,0.24);\n      clip-path: polygon(35% 0, 65% 0, 65% 30%, 90% 100%, 10% 100%, 35% 30%);\n    }\n\n    .ols-rn-chem-visual--undergrad::after {\n      width: 54px;\n      height: 14px;\n      left: 50%;\n      top: 34%;\n      transform: translateX(-50%);\n      border-radius: 999px;\n      background: rgba(59,109,17,0.16);\n    }\n\n    .ols-rn-chem-visual--undergrad .ols-rn-chem-orbit,\n    .ols-rn-chem-visual--undergrad .ols-rn-chem-bond {\n      display: none;\n    }\n\n    .ols-rn-chem-visual--undergrad .ols-rn-chem-core { left: 50%; top: 66%; width: 18px; height: 18px; }\n    .ols-rn-chem-visual--undergrad .ols-rn-chem-node--one { left: 39%; top: 50%; width: 13px; height: 13px; opacity: 0.86; }\n    .ols-rn-chem-visual--undergrad .ols-rn-chem-node--two { right: 38%; top: 56%; width: 11px; height: 11px; opacity: 0.76; }\n    .ols-rn-chem-visual--undergrad .ols-rn-chem-node--three { left: 54%; bottom: 24%; width: 12px; height: 12px; opacity: 0.82; }\n\n    .ols-rn-chem-visual--masters {\n      background:\n        radial-gradient(ellipse at 50% 45%, rgba(111,61,150,0.16), transparent 34%),\n        repeating-linear-gradient(115deg, rgba(111,61,150,0.08) 0 2px, transparent 2px 18px),\n        linear-gradient(135deg, rgba(255,255,255,0.98), rgba(247,240,255,0.78));\n    }\n\n    .ols-rn-chem-visual--masters .ols-rn-chem-orbit {\n      width: 132px;\n      height: 72px;\n      opacity: 0.25;\n      border-width: 2px;\n      transform: translate(-50%, -50%) rotate(var(--orbit-rotate, 0deg)) scaleX(1.1);\n    }\n\n    .ols-rn-chem-visual--masters .ols-rn-chem-orbit:nth-child(2) { width: 84px; height: 132px; }\n    .ols-rn-chem-visual--masters .ols-rn-chem-core { width: 26px; height: 26px; }\n    .ols-rn-chem-visual--masters .ols-rn-chem-bond { height: 2px; opacity: 0.13; }\n    .ols-rn-chem-visual--masters .ols-rn-chem-node--one { left: 26%; top: 30%; width: 16px; height: 16px; }\n    .ols-rn-chem-visual--masters .ols-rn-chem-node--two { right: 22%; top: 32%; width: 15px; height: 15px; }\n    .ols-rn-chem-visual--masters .ols-rn-chem-node--three { left: 49%; bottom: 22%; width: 16px; height: 16px; }\n\n    .ols-rn-image-placeholder {\n      width: 100%;\n      min-height: 150px;\n      border-radius: 22px;\n      border: 2px dashed rgba(28, 36, 75, 0.18);\n      background: rgba(255,255,255,0.72);\n      display: grid;\n      place-items: center;\n      text-align: center;\n      padding: 22px;\n      color: var(--ols-muted);\n      font-size: 14px;\n      font-weight: 700;\n      text-transform: uppercase;\n      letter-spacing: 0.04em;\n    }\n\n    .ols-rn-card-status {\n      position: absolute;\n      top: 16px;\n      right: 16px;\n      z-index: 2;\n      display: inline-flex;\n      align-items: center;\n      padding: 6px 12px;\n      border-radius: 999px;\n      font-size: 11px;\n      font-weight: 800;\n      box-shadow: 0 6px 16px rgba(28, 36, 75, 0.08);\n    }\n\n    .ols-rn-card-status--available {\n      background: #eaf3de;\n      color: var(--ols-green);\n      border: 1px solid rgba(59, 109, 17, 0.22);\n    }\n\n    .ols-rn-card-status--soon {\n      background: #ffffff;\n      color: var(--ols-muted);\n      border: 1px solid rgba(28, 36, 75, 0.14);\n    }\n\n    .ols-rn-card-body {\n      flex: 1;\n      padding: 22px 20px 30px;\n      display: flex;\n      flex-direction: column;\n      justify-content: space-between;\n      gap: 20px;\n    }\n\n    .ols-rn-card-title {\n      margin: 0 0 12px;\n      color: var(--ols-navy);\n      font-size: clamp(21px, 1.75vw, 28px);\n      font-weight: 800;\n      line-height: 1.08;\n      letter-spacing: -0.04em;\n      text-shadow: -9px 0 9px rgba(28, 36, 75, 0.06);\n    }\n\n    .ols-rn-card-desc {\n      margin: 0;\n      color: var(--ols-muted);\n      font-size: 14px;\n      font-weight: 300;\n      line-height: 1.68;\n    }\n\n    .ols-rn-card-cta {\n      display: inline-flex;\n      align-items: center;\n      gap: 6px;\n      color: var(--ols-blue);\n      font-size: 13px;\n      font-weight: 800;\n      padding-top: 4px;\n    }\n\n    .ols-rn-card-cta svg {\n      width: 15px;\n      height: 15px;\n      transition: transform 0.22s ease;\n    }\n\n    .ols-rn-subject-card--available:hover .ols-rn-card-cta svg {\n      transform: translateX(4px);\n    }\n\n    \/* =========================================================\n       COURSE CTA CARD\n    ========================================================= *\/\n\n    .ols-rn-course-cta-section {\n      padding: 0 0 28px;\n      background:\n        radial-gradient(circle at top center, rgba(70, 127, 247, 0.08), transparent 38%),\n        linear-gradient(180deg, #ffffff 0%, #f7f9fd 100%);\n    }\n\n    .ols-rn-course-cta {\n      background:\n        radial-gradient(circle at top left, rgba(70,127,247,0.18), transparent 35%),\n        linear-gradient(135deg, #1C244B 0%, #0f4fa8 100%);\n      border-radius: 34px;\n      padding: clamp(30px, 5vw, 58px);\n      box-shadow: 0 28px 80px rgba(28, 36, 75, 0.24);\n      overflow: hidden;\n      text-align: center;\n      color: #ffffff;\n    }\n\n    .ols-rn-course-pill {\n      display: inline-flex;\n      align-items: center;\n      width: fit-content;\n      padding: 8px 15px;\n      border-radius: 999px;\n      background: rgba(255,255,255,0.12);\n      border: 1px solid rgba(255,255,255,0.22);\n      color: #ffffff;\n      font-size: 12px;\n      font-weight: 800;\n      margin: 0 auto 18px;\n    }\n\n    .ols-rn-course-cta h2 {\n      margin: 0 auto 14px;\n      max-width: 850px;\n      color: #ffffff;\n      font-size: clamp(38px, 5vw, 70px);\n      line-height: 1.04;\n      font-weight: 800;\n      letter-spacing: -0.045em;\n      text-shadow: -9px 0 9px rgba(0, 0, 0, 0.16);\n    }\n\n    .ols-rn-course-cta p {\n      margin: 0 auto 28px;\n      color: rgba(255,255,255,0.9);\n      font-size: clamp(16px, 1.6vw, 21px);\n      line-height: 1.72;\n      font-weight: 300;\n      max-width: 820px;\n    }\n\n    .ols-rn-course-button,\n    .ols-rn-course-button:visited,\n    .ols-rn-course-button:hover,\n    .ols-rn-course-button:focus,\n    .ols-rn-course-button:active {\n      display: inline-flex;\n      align-items: center;\n      justify-content: center;\n      width: fit-content;\n      min-height: 48px;\n      padding: 14px 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20px;\n        grid-template-columns: minmax(0, 1fr) 32px;\n        gap: 14px;\n        font-size: 14px;\n      }\n\n      .ols-rn-faq-icon {\n        width: 32px;\n        height: 32px;\n      }\n\n      .ols-rn-faq-answer-inner {\n        padding: 16px 20px 22px;\n      }\n    }\n  <\/style>\n\n  <!-- BREADCRUMB -->\n  <div class=\"ols-rn-breadcrumb-bar\">\n    <div class=\"ols-rn-container\">\n      <nav class=\"ols-rn-breadcrumb\" aria-label=\"Breadcrumb\">\n        <span>Revision Notes<\/span>\n      <\/nav>\n    <\/div>\n  <\/div>\n\n  <!-- HERO -->\n  <header class=\"ols-rn-hero\">\n    <div class=\"ols-rn-container\">\n      <div class=\"ols-rn-hero-inner\">\n        <div class=\"ols-rn-eyebrow\">Free chemistry resources for every stage<\/div>\n        <h1>Free Chemistry Revision Notes<\/h1>\n        <p>\n          Explore clear chemistry revision notes with interactive practice questions, worked answers and structured topic support from A Level foundations through to advanced chemistry study.\n        <\/p>\n\n        <div class=\"ols-rn-free-pill-row\">\n          <span class=\"ols-rn-free-pill\">Free chemistry notes<\/span>\n          <span class=\"ols-rn-free-pill\">Interactive chemistry practice<\/span>\n          <span class=\"ols-rn-free-pill\">Structured learning support<\/span>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/header>\n\n  <!-- SUBJECT CARDS -->\n<section class=\"ols-rn-subjects\">\n  <div class=\"ols-rn-container\">\n    <div class=\"ols-rn-subject-grid\">\n\n      <div id=\"gcse-chemistry\" class=\"ols-rn-subject-card ols-rn-subject-card--gcse ols-rn-subject-card--locked\" aria-label=\"GCSE Chemistry revision notes coming soon\">\n        <div class=\"ols-rn-card-status ols-rn-card-status--soon\">Coming Soon<\/div>\n        <div class=\"ols-rn-card-image\">\n          <div class=\"ols-rn-chem-visual ols-rn-chem-visual--gcse\" role=\"img\" aria-label=\"Abstract CSS chemistry visual for GCSE.\">\n            <span 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  <p class=\"ols-rn-card-desc\">\n              GCSE chemistry notes, foundation explanations and structured practice resources are being prepared for school-level learners.\n            <\/p>\n          <\/div>\n          <div class=\"ols-rn-card-cta\">Coming soon<\/div>\n        <\/div>\n      <\/div>\n\n      <a class=\"ols-rn-subject-card ols-rn-subject-card--chemistry ols-rn-subject-card--available\" href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/\" aria-label=\"Open A Level Chemistry revision notes\">\n        <div class=\"ols-rn-card-status ols-rn-card-status--available\">Available<\/div>\n        <div class=\"ols-rn-card-image\">\n          <div class=\"ols-rn-chem-visual ols-rn-chem-visual--alevel\" role=\"img\" aria-label=\"Abstract CSS chemistry visual for A Level.\">\n            <span class=\"ols-rn-chem-orbit\" style=\"--orbit-rotate: 0deg;\"><\/span>\n            <span class=\"ols-rn-chem-orbit\" style=\"--orbit-rotate: 60deg;\"><\/span>\n            <span class=\"ols-rn-chem-orbit\" style=\"--orbit-rotate: 120deg;\"><\/span>\n            <span class=\"ols-rn-chem-bond ols-rn-chem-bond--one\"><\/span>\n            <span class=\"ols-rn-chem-bond ols-rn-chem-bond--two\"><\/span>\n            <span class=\"ols-rn-chem-bond ols-rn-chem-bond--three\"><\/span>\n            <span class=\"ols-rn-chem-node ols-rn-chem-node--one\"><\/span>\n            <span class=\"ols-rn-chem-node ols-rn-chem-node--two\"><\/span>\n            <span class=\"ols-rn-chem-node ols-rn-chem-node--three\"><\/span>\n            <span class=\"ols-rn-chem-core\"><\/span>\n            <span class=\"ols-rn-chem-level\">A Level<\/span>\n          <\/div>\n        <\/div>\n        <div class=\"ols-rn-card-body\">\n          <div>\n            <h2 class=\"ols-rn-card-title\">A Level Chemistry<\/h2>\n            <p class=\"ols-rn-card-desc\">\n              Access free A Level Chemistry notes, interactive practice questions, worked answers and topic-by-topic support.\n            <\/p>\n          <\/div>\n          <div class=\"ols-rn-card-cta\">\n            Start revising\n            <svg viewBox=\"0 0 20 20\" fill=\"none\" aria-hidden=\"true\">\n              <path d=\"M7.5 4.5L13 10L7.5 15.5\" stroke=\"currentColor\" stroke-width=\"2.2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path>\n            <\/svg>\n          <\/div>\n        <\/div>\n      <\/a>\n\n      <div id=\"undergraduate-chemistry\" class=\"ols-rn-subject-card ols-rn-subject-card--biology ols-rn-subject-card--locked\" aria-label=\"Undergraduate Chemistry revision notes coming soon\">\n        <div class=\"ols-rn-card-status ols-rn-card-status--soon\">Coming Soon<\/div>\n        <div class=\"ols-rn-card-image\">\n          <div class=\"ols-rn-chem-visual ols-rn-chem-visual--undergrad\" role=\"img\" aria-label=\"Abstract CSS chemistry visual for Undergraduate.\">\n            <span class=\"ols-rn-chem-orbit\" style=\"--orbit-rotate: 0deg;\"><\/span>\n            <span class=\"ols-rn-chem-orbit\" style=\"--orbit-rotate: 60deg;\"><\/span>\n            <span class=\"ols-rn-chem-orbit\" style=\"--orbit-rotate: 120deg;\"><\/span>\n            <span class=\"ols-rn-chem-bond ols-rn-chem-bond--one\"><\/span>\n            <span class=\"ols-rn-chem-bond ols-rn-chem-bond--two\"><\/span>\n            <span class=\"ols-rn-chem-bond ols-rn-chem-bond--three\"><\/span>\n            <span class=\"ols-rn-chem-node ols-rn-chem-node--one\"><\/span>\n            <span class=\"ols-rn-chem-node ols-rn-chem-node--two\"><\/span>\n            <span class=\"ols-rn-chem-node ols-rn-chem-node--three\"><\/span>\n            <span class=\"ols-rn-chem-core\"><\/span>\n            <span class=\"ols-rn-chem-level\">Undergraduate<\/span>\n          <\/div>\n        <\/div>\n        <div class=\"ols-rn-card-body\">\n          <div>\n            <h2 class=\"ols-rn-card-title\">Undergraduate Chemistry<\/h2>\n            <p class=\"ols-rn-card-desc\">\n              Undergraduate chemistry notes, topic summaries and advanced practice resources are being prepared for university-level learners.\n            <\/p>\n          <\/div>\n          <div class=\"ols-rn-card-cta\">Coming soon<\/div>\n        <\/div>\n      <\/div>\n\n      <div id=\"masters-level-chemistry\" class=\"ols-rn-subject-card ols-rn-subject-card--physics ols-rn-subject-card--locked\" aria-label=\"Masters level Chemistry revision notes coming soon\">\n        <div class=\"ols-rn-card-status ols-rn-card-status--soon\">Coming Soon<\/div>\n        <div class=\"ols-rn-card-image\">\n          <div class=\"ols-rn-chem-visual ols-rn-chem-visual--masters\" role=\"img\" aria-label=\"Abstract CSS chemistry visual for Masters.\">\n            <span class=\"ols-rn-chem-orbit\" style=\"--orbit-rotate: 0deg;\"><\/span>\n            <span class=\"ols-rn-chem-orbit\" style=\"--orbit-rotate: 60deg;\"><\/span>\n            <span class=\"ols-rn-chem-orbit\" style=\"--orbit-rotate: 120deg;\"><\/span>\n            <span class=\"ols-rn-chem-bond ols-rn-chem-bond--one\"><\/span>\n            <span class=\"ols-rn-chem-bond ols-rn-chem-bond--two\"><\/span>\n            <span class=\"ols-rn-chem-bond ols-rn-chem-bond--three\"><\/span>\n            <span class=\"ols-rn-chem-node ols-rn-chem-node--one\"><\/span>\n            <span class=\"ols-rn-chem-node ols-rn-chem-node--two\"><\/span>\n            <span class=\"ols-rn-chem-node ols-rn-chem-node--three\"><\/span>\n            <span class=\"ols-rn-chem-core\"><\/span>\n            <span class=\"ols-rn-chem-level\">Masters<\/span>\n          <\/div>\n        <\/div>\n        <div class=\"ols-rn-card-body\">\n          <div>\n            <h2 class=\"ols-rn-card-title\">Masters Level Chemistry<\/h2>\n            <p class=\"ols-rn-card-desc\">\n              Masters-level chemistry notes, advanced explanations and specialist practice resources will be added as the platform develops.\n            <\/p>\n          <\/div>\n          <div class=\"ols-rn-card-cta\">Coming soon<\/div>\n        <\/div>\n      <\/div>\n\n    <\/div>\n  <\/div>\n<\/section>\n\n  <!-- CTA CARD -->\n  <section class=\"ols-rn-course-cta-section\">\n    <div class=\"ols-rn-container\">\n      <div class=\"ols-rn-course-cta\">\n        <div class=\"ols-rn-course-pill\">Premium chemistry courses<\/div>\n        <h2>Unlock Full Chemistry Learning<\/h2>\n        <p>\n          Move beyond revision notes with structured chemistry lessons, multiple-choice question banks, short-answer practice, marked feedback and guided topic-by-topic learning.\n        <\/p>\n        <a class=\"ols-rn-course-button\" href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/\">\n          View Courses\n        <\/a>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- FAQ -->\n  <section class=\"ols-rn-faq\">\n    <div class=\"ols-rn-container\">\n\n      <h2>FAQ<\/h2>\n\n      <div class=\"ols-rn-faq-grid\">\n\n        <div class=\"ols-rn-faq-item\">\n          <button class=\"ols-rn-faq-question\" type=\"button\">\n            <span class=\"ols-rn-faq-title\">Are the revision notes completely free?<\/span>\n            <span class=\"ols-rn-faq-icon\">+<\/span>\n          <\/button>\n          <div class=\"ols-rn-faq-answer\">\n            <div class=\"ols-rn-faq-answer-inner\">\n              Yes. The chemistry revision notes are free to access and students do not need to create an account or sign in to use them. They are designed as open study support for learners who want clear explanations, structured topic guidance and active practice before moving on to more advanced questions.\n            <\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ols-rn-faq-item\">\n          <button class=\"ols-rn-faq-question\" type=\"button\">\n            <span class=\"ols-rn-faq-title\">Do I need an account to use the free revision notes?<\/span>\n            <span class=\"ols-rn-faq-icon\">+<\/span>\n          <\/button>\n          <div class=\"ols-rn-faq-answer\">\n            <div class=\"ols-rn-faq-answer-inner\">\n              No. The free chemistry notes are available without an account. Learners can open the relevant chemistry page, choose their topic and begin studying straight away. This makes the notes useful for quick revision, independent study, exam preparation and checking understanding after lessons.\n            <\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ols-rn-faq-item\">\n          <button class=\"ols-rn-faq-question\" type=\"button\">\n            <span class=\"ols-rn-faq-title\">What makes these revision notes different from ordinary notes?<\/span>\n            <span class=\"ols-rn-faq-icon\">+<\/span>\n          <\/button>\n          <div class=\"ols-rn-faq-answer\">\n            <div class=\"ols-rn-faq-answer-inner\">\n              The notes are written to support active chemistry learning rather than passive reading. They combine concise explanations, topic structure, interactive H5P questions, practice tasks and worked answers so that learners can test knowledge as they study. The aim is to help students move from recognising content to applying chemistry accurately.\n            <\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ols-rn-faq-item\">\n          <button class=\"ols-rn-faq-question\" type=\"button\">\n            <span class=\"ols-rn-faq-title\">Who writes the Chemistry revision notes?<\/span>\n            <span class=\"ols-rn-faq-icon\">+<\/span>\n          <\/button>\n          <div class=\"ols-rn-faq-answer\">\n            <div class=\"ols-rn-faq-answer-inner\">\n              The Chemistry resources are written by Dr. Mohammed Al-Fatah, who has a BSc Chemistry from UCL with first-class honours, an MSc in Advanced Chemical Research from UCL, an MA Education from UCL and a PGCE in Secondary School Chemistry from Goldsmiths. He has over a decade of chemistry teaching experience across secondary, sixth-form and online learning contexts.\n            <\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ols-rn-faq-item\">\n          <button class=\"ols-rn-faq-question\" type=\"button\">\n            <span class=\"ols-rn-faq-title\">Do the notes include interactive questions?<\/span>\n            <span class=\"ols-rn-faq-icon\">+<\/span>\n          <\/button>\n          <div class=\"ols-rn-faq-answer\">\n            <div class=\"ols-rn-faq-answer-inner\">\n              Yes. The free chemistry notes include interactive H5P-style questions where appropriate. These questions are designed to check understanding while learners study, helping them identify gaps quickly rather than waiting until the end of a topic. This makes the pages more active than standard written notes.\n            <\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ols-rn-faq-item\">\n          <button class=\"ols-rn-faq-question\" type=\"button\">\n            <span class=\"ols-rn-faq-title\">Are there practice questions and answers?<\/span>\n            <span class=\"ols-rn-faq-icon\">+<\/span>\n          <\/button>\n          <div class=\"ols-rn-faq-answer\">\n            <div class=\"ols-rn-faq-answer-inner\">\n              Yes. The chemistry pages include practice questions, worked answers and topic support where relevant. The purpose is not only to explain the content, but also to help learners understand how chemistry ideas are applied in questions and problem-solving tasks.\n            <\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ols-rn-faq-item\">\n          <button class=\"ols-rn-faq-question\" type=\"button\">\n            <span class=\"ols-rn-faq-title\">Which chemistry levels are available?<\/span>\n            <span class=\"ols-rn-faq-icon\">+<\/span>\n          <\/button>\n          <div class=\"ols-rn-faq-answer\">\n            <div class=\"ols-rn-faq-answer-inner\">\n              A Level Chemistry revision notes are currently available. GCSE Chemistry, Undergraduate Chemistry and Masters Level Chemistry resources are planned and will be added as the platform develops. The page has been structured so learners can access available levels immediately while clearly seeing which levels are still in preparation.\n            <\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"ols-rn-faq-item\">\n          <button class=\"ols-rn-faq-question\" type=\"button\">\n            <span class=\"ols-rn-faq-title\">How are the free chemistry notes different from the full courses?<\/span>\n            <span class=\"ols-rn-faq-icon\">+<\/span>\n          <\/button>\n          <div class=\"ols-rn-faq-answer\">\n            <div class=\"ols-rn-faq-answer-inner\">\n              The free chemistry notes give learners open access to topic explanations and interactive practice. The full courses go further by adding structured virtual lessons, more complete question banks, short-answer practice, guided assignments and specialist feedback. 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