<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <title>Square Root Stop Rule for 36</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }
    body {
      width: 100%;
      min-height: 100%;
      background: #ffffff;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 12px;
    }
    .diagram-wrap {
      width: 100%;
      max-width: 580px;
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    svg {
      width: 100%;
      height: auto;
      overflow: visible;
    }
    .arc {
      fill: none;
      stroke-width: 3.5;
      stroke-linecap: round;
      transition: stroke-width 0.25s ease, opacity 0.25s ease;
      cursor: pointer;
    }
    .arc:hover {
      stroke-width: 5;
    }
    .node-group {
      cursor: pointer;
    }
    .node-circle {
      transition: transform 0.2s ease, fill 0.2s ease;
    }
    .node-text {
      font-size: 15px;
      font-weight: 700;
      fill: #1e2945;
      text-anchor: middle;
      dominant-baseline: central;
      user-select: none;
    }
    .stop-line {
      stroke: #dc2626;
      stroke-width: 2.5;
      stroke-dasharray: 5 4;
    }
    .btn-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      justify-content: center;
      margin-top: 14px;
      width: 100%;
    }
    .btn {
      border: 1.5px solid #e2e8f0;
      background: #f8fafc;
      color: #1e2945;
      font-size: 13px;
      font-weight: 700;
      padding: 6px 10px;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .btn:hover {
      border-color: #22b7ff;
      background: #f0f9ff;
    }
    .btn.active {
      background: #1e2945;
      color: #ffffff;
      border-color: #1e2945;
    }
    .dimmed {
      opacity: 0.18 !important;
    }
    .highlight {
      stroke-width: 5.5 !important;
      opacity: 1 !important;
    }
  </style>
</head>
<body>

<div class="diagram-wrap">
  <svg viewBox="0 0 560 300" aria-label="Factor pairs and square root stop rule for 36">
    <defs>
      <filter id="badge-shadow" x="-10%" y="-10%" width="120%" height="130%">
        <feDropShadow dx="0" dy="2" stdDeviation="2" flood-opacity="0.08" />
      </filter>
    </defs>

    
    <path id="arc-0" class="arc" d="M 45 200 C 45 40, 515 40, 515 200" stroke="#f43f5e" />
    <path id="arc-1" class="arc" d="M 98 200 C 98 75, 452 75, 452 200" stroke="#f97316" />
    <path id="arc-2" class="arc" d="M 152 200 C 152 108, 392 108, 392 200" stroke="#10b981" />
    <path id="arc-3" class="arc" d="M 205 200 C 205 138, 335 138, 335 200" stroke="#22b7ff" />
    
    <path id="arc-4" class="arc" d="M 262 195 C 235 130, 295 130, 268 195" stroke="#8b5cf6" />

    
    <line x1="20" y1="200" x2="540" y2="200" stroke="#cbd5e1" stroke-width="2" stroke-linecap="round" />

    
    <line class="stop-line" x1="265" y1="36" x2="265" y2="242" />

    
    <g transform="translate(265, 28)">
      <rect x="-85" y="-16" width="170" height="32" rx="16" fill="#dc2626" />
      <text x="0" y="1" fill="#ffffff" font-size="12" font-weight="800" text-anchor="middle" dominant-baseline="central" letter-spacing="0.5">
        STOP AT √36 = 6
      </text>
    </g>

    
    <text x="135" y="270" fill="#64748b" font-size="13" font-weight="700" text-anchor="middle">
      Test ≤ 6
    </text>
    <text x="415" y="270" fill="#94a3b8" font-size="13" font-weight="600" text-anchor="middle">
      Already paired
    </text>

    
    
    <g class="node-group" id="node-1" transform="translate(45, 200)">
      <circle class="node-circle" r="16" fill="#ffffff" stroke="#f43f5e" stroke-width="2.5" />
      <text class="node-text">1</text>
    </g>
    
    <g class="node-group" id="node-2" transform="translate(98, 200)">
      <circle class="node-circle" r="16" fill="#ffffff" stroke="#f97316" stroke-width="2.5" />
      <text class="node-text">2</text>
    </g>
    
    <g class="node-group" id="node-3" transform="translate(152, 200)">
      <circle class="node-circle" r="16" fill="#ffffff" stroke="#10b981" stroke-width="2.5" />
      <text class="node-text">3</text>
    </g>
    
    <g class="node-group" id="node-4" transform="translate(205, 200)">
      <circle class="node-circle" r="16" fill="#ffffff" stroke="#22b7ff" stroke-width="2.5" />
      <text class="node-text">4</text>
    </g>
    
    <g class="node-group" id="node-6" transform="translate(265, 200)">
      <circle class="node-circle" r="18" fill="#8b5cf6" stroke="#8b5cf6" stroke-width="2.5" />
      <text class="node-text" fill="#ffffff" style="fill:#ffffff;">6</text>
    </g>
    
    <g class="node-group" id="node-9" transform="translate(335, 200)">
      <circle class="node-circle" r="16" fill="#ffffff" stroke="#22b7ff" stroke-width="2.5" />
      <text class="node-text">9</text>
    </g>
    
    <g class="node-group" id="node-12" transform="translate(392, 200)">
      <circle class="node-circle" r="16" fill="#ffffff" stroke="#10b981" stroke-width="2.5" />
      <text class="node-text">12</text>
    </g>
    
    <g class="node-group" id="node-18" transform="translate(452, 200)">
      <circle class="node-circle" r="16" fill="#ffffff" stroke="#f97316" stroke-width="2.5" />
      <text class="node-text">18</text>
    </g>
    
    <g class="node-group" id="node-36" transform="translate(515, 200)">
      <circle class="node-circle" r="16" fill="#ffffff" stroke="#f43f5e" stroke-width="2.5" />
      <text class="node-text">36</text>
    </g>
  </svg>

  
  <div class="btn-bar" id="btnBar">
    <button class="btn active" data-pair="-1">All Pairs</button>
    <button class="btn" data-pair="0">1 × 36</button>
    <button class="btn" data-pair="1">2 × 18</button>
    <button class="btn" data-pair="2">3 × 12</button>
    <button class="btn" data-pair="3">4 × 9</button>
    <button class="btn" data-pair="4">6 × 6</button>
  </div>
</div>

<script>
  const pairs = [
    { arc: 'arc-0', nodes: ['node-1', 'node-36'] },
    { arc: 'arc-1', nodes: ['node-2', 'node-18'] },
    { arc: 'arc-2', nodes: ['node-3', 'node-12'] },
    { arc: 'arc-3', nodes: ['node-4', 'node-9'] },
    { arc: 'arc-4', nodes: ['node-6'] }
  ];

  const allArcs = pairs.map(p => document.getElementById(p.arc));
  const allNodeIds = ['node-1', 'node-2', 'node-3', 'node-4', 'node-6', 'node-9', 'node-12', 'node-18', 'node-36'];
  const allNodes = allNodeIds.map(id => document.getElementById(id));
  const buttons = Array.from(document.querySelectorAll('.btn'));

  function selectPair(index) {
    buttons.forEach((b, i) => {
      b.classList.toggle('active', (index === -1 && i === 0) || (i - 1 === index));
    });

    if (index === -1) {
      allArcs.forEach(a => {
        a.classList.remove('dimmed', 'highlight');
      });
      allNodes.forEach(n => {
        n.classList.remove('dimmed');
      });
      return;
    }

    const target = pairs[index];
    allArcs.forEach((a, i) => {
      if (i === index) {
        a.classList.add('highlight');
        a.classList.remove('dimmed');
      } else {
        a.classList.remove('highlight');
        a.classList.add('dimmed');
      }
    });

    allNodes.forEach(n => {
      if (target.nodes.includes(n.id)) {
        n.classList.remove('dimmed');
      } else {
        n.classList.add('dimmed');
      }
    });
  }

  buttons.forEach(btn => {
    btn.addEventListener('click', () => {
      const idx = parseInt(btn.dataset.pair, 10);
      selectPair(idx);
    });
  });

  pairs.forEach((p, idx) => {
    const arcEl = document.getElementById(p.arc);
    arcEl.addEventListener('click', () => selectPair(idx));

    p.nodes.forEach(nId => {
      const nodeEl = document.getElementById(nId);
      nodeEl.addEventListener('click', () => selectPair(idx));
    });
  });
</script>

</body>
</html>

Finding Factor Pairs of Natural Numbers

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: transparent;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
      padding: 16px 12px;
      user-select: none;
    }
    .header {
      text-align: center;
      margin-bottom: 20px;
    }
    .target-title {
      font-size: 18px;
      font-weight: 700;
      color: #0f172a;
    }
    .test-limit {
      font-size: 14px;
      font-weight: 500;
      color: #64748b;
      margin-top: 2px;
    }
    .pairs-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      width: 100%;
      max-width: 480px;
      margin-bottom: 18px;
    }
    @media (max-width: 420px) {
      .pairs-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    .pair-badge {
      background-color: #e0f2fe;
      color: #0369a1;
      border: 2px solid transparent;
      border-radius: 9999px;
      padding: 10px 14px;
      font-size: 16px;
      font-weight: 700;
      text-align: center;
      cursor: pointer;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
      transition: background-color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    }
    .pair-badge:hover {
      background-color: #bae6fd;
    }
    .pair-badge.active {
      background-color: #0284c7;
      color: #ffffff;
      box-shadow: 0 4px 10px rgba(2, 132, 199, 0.3);
    }
    .equation-display {
      height: 32px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 17px;
      font-weight: 600;
      color: #0284c7;
      margin-bottom: 14px;
    }
    .footer-note {
      font-size: 14px;
      font-weight: 600;
      color: #475569;
      background: #f1f5f9;
      padding: 8px 16px;
      border-radius: 8px;
      text-align: center;
    }
  </style>
</head>
<body>

  <div class="header">
    <div class="target-title">Target: 60</div>
    <div class="test-limit">Test limit: up to 7</div>
  </div>

  <div class="pairs-grid" id="badgeContainer">
    <div class="pair-badge active" data-a="1" data-b="60">(1, 60)</div>
    <div class="pair-badge" data-a="2" data-b="30">(2, 30)</div>
    <div class="pair-badge" data-a="3" data-b="20">(3, 20)</div>
    <div class="pair-badge" data-a="4" data-b="15">(4, 15)</div>
    <div class="pair-badge" data-a="5" data-b="12">(5, 12)</div>
    <div class="pair-badge" data-a="6" data-b="10">(6, 10)</div>
  </div>

  <div class="equation-display" id="equationDisplay">1 &times; 60 = 60</div>

  <div class="footer-note">
    Total factor pairs = 6 &nbsp;|&nbsp; Total factors = 12
  </div>

  <script src="{{VENDOR_CDN}}/classace-diagram.js"></script>
  <script>
    const badges = $$('.pair-badge');
    const eqDisplay = $('#equationDisplay');

    badges.forEach(badge => {
      onTap(badge, () => {
        badges.forEach(b => b.classList.remove('active'));
        badge.classList.add('active');
        const a = badge.getAttribute('data-a');
        const b = badge.getAttribute('data-b');
        eqDisplay.innerHTML = `${a} &times; ${b} = 60`;
      });
    });
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    }

    body {
      width: 100%;
      min-height: 100%;
      background: transparent;
      color: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
    }

    .grid-layout {
      width: 100%;
      max-width: 620px;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
    }

    .array-card {
      background: #ffffff;
      border: 1px solid #e6e6e6;
      border-radius: 12px;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
      transition: border-color 0.25s ease, box-shadow 0.25s ease;
      user-select: none;
      min-height: 160px;
    }

    .array-card.active,
    .array-card:focus-visible {
      border-color: #22b7ff;
      box-shadow: 0 0 0 2px rgba(34, 183, 255, 0.25), 0 4px 12px rgba(34, 183, 255, 0.15);
      outline: none;
    }

    .dim-label {
      font-size: 16px;
      font-weight: 700;
      color: #1e2945;
      margin-bottom: 8px;
    }

    .array-wrapper {
      flex: 1;
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 4px;
      min-height: 70px;
    }

    .mini-grid {
      display: grid;
      gap: 2px;
      justify-content: center;
      align-content: center;
      max-width: 100%;
    }

    .cell {
      background: #22b7ff;
      border-radius: 2px;
      box-shadow: 0 0 4px rgba(34, 183, 255, 0.55);
      transition: background-color 0.2s ease, opacity 0.2s ease;
    }

    /* 1 × 24 */
    .grid-1-24 {
      grid-template-columns: repeat(24, 7px);
      grid-template-rows: 14px;
      gap: 1.5px;
    }
    .grid-1-24 .cell {
      width: 7px;
      height: 14px;
      border-radius: 1.5px;
    }

    /* 2 × 12 */
    .grid-2-12 {
      grid-template-columns: repeat(12, 12px);
      grid-template-rows: repeat(2, 12px);
    }
    .grid-2-12 .cell {
      width: 12px;
      height: 12px;
    }

    /* 3 × 8 */
    .grid-3-8 {
      grid-template-columns: repeat(8, 14px);
      grid-template-rows: repeat(3, 14px);
    }
    .grid-3-8 .cell {
      width: 14px;
      height: 14px;
    }

    /* 4 × 6 */
    .grid-4-6 {
      grid-template-columns: repeat(6, 16px);
      grid-template-rows: repeat(4, 16px);
    }
    .grid-4-6 .cell {
      width: 16px;
      height: 16px;
    }

    .eq-tag {
      margin-top: 8px;
      font-size: 13px;
      font-weight: 600;
      color: #1e2945;
      background: #f1f5f9;
      padding: 3px 10px;
      border-radius: 20px;
      letter-spacing: 0.2px;
    }

    .array-card.active .eq-tag {
      background: rgba(34, 183, 255, 0.15);
      color: #0284c7;
    }

    @media (max-width: 420px) {
      body {
        padding: 8px;
      }
      .grid-layout {
        gap: 8px;
      }
      .array-card {
        padding: 10px 6px;
        min-height: 145px;
      }
      .dim-label {
        font-size: 14px;
        margin-bottom: 4px;
      }
      .grid-1-24 {
        grid-template-columns: repeat(24, 5.5px);
        grid-template-rows: 12px;
        gap: 1px;
      }
      .grid-1-24 .cell {
        width: 5.5px;
        height: 12px;
      }
      .grid-2-12 {
        grid-template-columns: repeat(12, 10px);
        grid-template-rows: repeat(2, 10px);
        gap: 1.5px;
      }
      .grid-2-12 .cell {
        width: 10px;
        height: 10px;
      }
      .grid-3-8 {
        grid-template-columns: repeat(8, 12px);
        grid-template-rows: repeat(3, 12px);
      }
      .grid-3-8 .cell {
        width: 12px;
        height: 12px;
      }
      .grid-4-6 {
        grid-template-columns: repeat(6, 14px);
        grid-template-rows: repeat(4, 14px);
      }
      .grid-4-6 .cell {
        width: 14px;
        height: 14px;
      }
      .eq-tag {
        font-size: 11.5px;
        padding: 2px 8px;
      }
    }
  </style>
</head>
<body>

  <div class="grid-layout">
    
    <div class="array-card active" tabindex="0" role="button" aria-label="1 by 24 array">
      <div class="dim-label">1 × 24</div>
      <div class="array-wrapper">
        <div class="mini-grid grid-1-24" id="grid-1"></div>
      </div>
      <div class="eq-tag">Product = 24</div>
    </div>

    
    <div class="array-card" tabindex="0" role="button" aria-label="2 by 12 array">
      <div class="dim-label">2 × 12</div>
      <div class="array-wrapper">
        <div class="mini-grid grid-2-12" id="grid-2"></div>
      </div>
      <div class="eq-tag">Product = 24</div>
    </div>

    
    <div class="array-card" tabindex="0" role="button" aria-label="3 by 8 array">
      <div class="dim-label">3 × 8</div>
      <div class="array-wrapper">
        <div class="mini-grid grid-3-8" id="grid-3"></div>
      </div>
      <div class="eq-tag">Product = 24</div>
    </div>

    
    <div class="array-card" tabindex="0" role="button" aria-label="4 by 6 array">
      <div class="dim-label">4 × 6</div>
      <div class="array-wrapper">
        <div class="mini-grid grid-4-6" id="grid-4"></div>
      </div>
      <div class="eq-tag">Product = 24</div>
    </div>
  </div>

  <script>
    // Generate 24 squares for each grid
    const grids = ['grid-1', 'grid-2', 'grid-3', 'grid-4'];
    grids.forEach(id => {
      const container = document.getElementById(id);
      for (let i = 0; i < 24; i++) {
        const cell = document.createElement('div');
        cell.className = 'cell';
        container.appendChild(cell);
      }
    });

    // Tap/Click interaction to select and highlight array pairs
    const cards = document.querySelectorAll('.array-card');
    cards.forEach(card => {
      const selectCard = () => {
        cards.forEach(c => c.classList.remove('active'));
        card.classList.add('active');
      };
      card.addEventListener('click', selectCard);
      card.addEventListener('keydown', (e) => {
        if (e.key === 'Enter' || e.key === ' ') {
          e.preventDefault();
          selectCard();
        }
      });
    });
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: #ffffff;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
    }

    .main-box {
      width: 100%;
      max-width: 500px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .controls {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0 4px 4px 4px;
    }

    .title {
      font-size: 15px;
      font-weight: 700;
      color: #1e2945;
      letter-spacing: -0.2px;
    }

    .btn-group {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .btn {
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
      color: #1e2945;
      border-radius: 6px;
      padding: 4px 10px;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      line-height: 1.2;
    }
    .btn:active { background: #e2e8f0; }

    .card-list {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .test-card {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 8px 12px;
      background: #f8fafc;
      border: 1.5px solid #e2e8f0;
      border-radius: 8px;
      cursor: pointer;
      transition: background-color 0.25s ease, box-shadow 0.25s ease;
    }

    .test-card.active {
      background: #ffffff;
      box-shadow: 0 0 0 2px #22b7ff;
    }

    .calc-side {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 15px;
      font-weight: 600;
      font-variant-numeric: tabular-nums;
    }

    .num-pill {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: #e2e8f0;
      color: #1e2945;
      font-size: 12px;
      font-weight: 700;
    }

    .test-card.active .num-pill {
      background: #22b7ff;
      color: #ffffff;
    }

    .result-badge {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      font-weight: 700;
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      background: #fef2f2;
      color: #dc2626;
      border: 1px solid #fecaca;
    }

    .icon-ok { color: #16a34a; font-weight: 800; }
    .icon-no { color: #dc2626; font-weight: 800; }

    .summary-bar {
      margin-top: 4px;
      padding: 8px 12px;
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      color: #1e2945;
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  </style>
</head>
<body>

  <div class="main-box">
    <div class="controls">
      <div class="title">Factors of 36 (Check 1 to 6)</div>
      <div class="btn-group">
        <button id="prevBtn" class="btn">◀</button>
        <button id="playBtn" class="btn">⏸</button>
        <button id="nextBtn" class="btn">▶</button>
      </div>
    </div>

    <div class="card-list">
      <div class="test-card step">
        <div class="calc-side">
          <span class="num-pill">1</span>
          <span>36 ÷ 1 = 36</span>
        </div>
        <div class="result-badge valid-badge">
          <span class="icon-ok">✓</span> Pair: 1, 36
        </div>
      </div>

      <div class="test-card step">
        <div class="calc-side">
          <span class="num-pill">2</span>
          <span>36 ÷ 2 = 18</span>
        </div>
        <div class="result-badge valid-badge">
          <span class="icon-ok">✓</span> Pair: 2, 18
        </div>
      </div>

      <div class="test-card step">
        <div class="calc-side">
          <span class="num-pill">3</span>
          <span>36 ÷ 3 = 12</span>
        </div>
        <div class="result-badge valid-badge">
          <span class="icon-ok">✓</span> Pair: 3, 12
        </div>
      </div>

      <div class="test-card step">
        <div class="calc-side">
          <span class="num-pill">4</span>
          <span>36 ÷ 4 = 9</span>
        </div>
        <div class="result-badge valid-badge">
          <span class="icon-ok">✓</span> Pair: 4, 9
        </div>
      </div>

      <div class="test-card step">
        <div class="calc-side">
          <span class="num-pill">5</span>
          <span>36 ÷ 5 = 7 R1</span>
        </div>
        <div class="result-badge invalid-badge">
          <span class="icon-no">✕</span> Not a factor
        </div>
      </div>

      <div class="test-card step">
        <div class="calc-side">
          <span class="num-pill">6</span>
          <span>36 ÷ 6 = 6</span>
        </div>
        <div class="result-badge valid-badge">
          <span class="icon-ok">✓</span> Pair: 6, 6
        </div>
      </div>
    </div>

    <div class="summary-bar">
      <span>Pairs:</span>
      <span class="pairs-found">(1, 36) · (2, 18) · (3, 12) · (4, 9) · (6, 6)</span>
    </div>
  </div>

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</body>
</html>

OGM.6.NS.1

Aligned learning resources

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