<!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: #ffffff;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
      padding: 12px;
      user-select: none;
    }

    .diagram-wrap {
      width: 100%;
      max-width: 480px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
    }

    svg {
      width: 100%;
      height: auto;
      overflow: visible;
    }

    .controls {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: #64748b;
      font-weight: 500;
    }

    .btn-group {
      display: flex;
      background: #f1f5f9;
      padding: 3px;
      border-radius: 8px;
      gap: 4px;
    }

    .unit-btn {
      border: none;
      background: transparent;
      padding: 4px 10px;
      font-size: 13px;
      font-weight: 600;
      color: #475569;
      border-radius: 6px;
      cursor: pointer;
      transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    }

    .unit-btn.active {
      background: #ffffff;
      color: #0284c7;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    }

    /* SVG Text Styles */
    .unit-text {
      font-size: 14px;
      font-weight: 700;
      text-anchor: middle;
      dominant-baseline: central;
    }

    .bracket-label {
      font-size: 13px;
      font-weight: 700;
    }

    .total-title {
      font-size: 15px;
      font-weight: 800;
      fill: #0f172a;
    }

    .total-sub {
      font-size: 12px;
      font-weight: 600;
      fill: #64748b;
    }
  </style>
</head>
<body>

  <div class="diagram-wrap">
    <svg viewBox="0 0 450 240" aria-label="Tape diagram showing 2 blue units and 3 yellow units">
      
      <g id="blue-units">
        <rect x="24" y="46" width="58" height="46" rx="6" fill="#e0f2fe" stroke="#0284c7" stroke-width="2.5" />
        <rect x="82" y="46" width="58" height="46" rx="6" fill="#e0f2fe" stroke="#0284c7" stroke-width="2.5" />
        
        <text class="unit-text" x="53" y="69" fill="#0369a1" id="u-b1">4 oz</text>
        <text class="unit-text" x="111" y="69" fill="#0369a1" id="u-b2">4 oz</text>
      </g>

      
      <path d="M 24,38 L 24,30 Q 24,25 29,25 L 77,25 Q 82,25 82,18 Q 82,25 87,25 L 135,25 Q 140,25 140,30 L 140,38" 
            fill="none" stroke="#0284c7" stroke-width="2" stroke-linecap="round" />
      <text class="bracket-label" x="82" y="11" text-anchor="middle" fill="#0284c7" id="blue-total">Blue = 8 oz</text>

      
      <g id="yellow-units">
        <rect x="24" y="122" width="58" height="46" rx="6" fill="#fef9c3" stroke="#ca8a04" stroke-width="2.5" />
        <rect x="82" y="122" width="58" height="46" rx="6" fill="#fef9c3" stroke="#ca8a04" stroke-width="2.5" />
        <rect x="140" y="122" width="58" height="46" rx="6" fill="#fef9c3" stroke="#ca8a04" stroke-width="2.5" />

        <text class="unit-text" x="53" y="145" fill="#854d0e" id="u-y1">4 oz</text>
        <text class="unit-text" x="111" y="145" fill="#854d0e" id="u-y2">4 oz</text>
        <text class="unit-text" x="169" y="145" fill="#854d0e" id="u-y3">4 oz</text>
      </g>

      
      <path d="M 24,176 L 24,184 Q 24,189 29,189 L 106,189 Q 111,189 111,196 Q 111,189 116,189 L 193,189 Q 198,189 198,184 L 198,176" 
            fill="none" stroke="#ca8a04" stroke-width="2" stroke-linecap="round" />
      <text class="bracket-label" x="111" y="214" text-anchor="middle" fill="#854d0e" id="yellow-total">Yellow = 12 oz</text>

      
      <path d="M 208,46 L 216,46 Q 221,46 221,51 L 221,102 Q 221,107 229,107 Q 221,107 221,112 L 221,163 Q 221,168 216,168 L 208,168" 
            fill="none" stroke="#64748b" stroke-width="2" stroke-linecap="round" />

      
      <g transform="translate(238, 102)">
        <text class="total-title" x="0" y="0" id="grand-total">Total = 20 oz</text>
        <text class="total-sub" x="0" y="19" id="total-formula">(5 units × 4 oz)</text>
      </g>
    </svg>

    
    <div class="controls">
      <span>1 Unit =</span>
      <div class="btn-group">
        <button class="unit-btn" onclick="setUnit(2)">2 oz</button>
        <button class="unit-btn active" onclick="setUnit(4)">4 oz</button>
        <button class="unit-btn" onclick="setUnit(5)">5 oz</button>
      </div>
    </div>
  </div>

  <script>
    function setUnit(val) {
      document.querySelectorAll('.unit-btn').forEach(btn => {
        btn.classList.toggle('active', btn.textContent.trim() === val + ' oz');
      });

      const label = val + ' oz';
      document.getElementById('u-b1').textContent = label;
      document.getElementById('u-b2').textContent = label;
      document.getElementById('u-y1').textContent = label;
      document.getElementById('u-y2').textContent = label;
      document.getElementById('u-y3').textContent = label;

      document.getElementById('blue-total').textContent = `Blue = ${val * 2} oz`;
      document.getElementById('yellow-total').textContent = `Yellow = ${val * 3} oz`;
      document.getElementById('grand-total').textContent = `Total = ${val * 5} oz`;
      document.getElementById('total-formula').textContent = `(5 units × ${val} oz)`;
    }
  </script>
</body>
</html>

Representing Ratios with Concrete Models

<!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="1:1">
  <title>Scaling Ratios</title>
  <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: transparent;
      padding: 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
    }
    .diagram {
      width: 100%;
      max-width: 440px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      position: relative;
    }
    .nav-bar {
      display: flex;
      justify-content: center;
      gap: 8px;
      margin-bottom: 2px;
    }
    .tab-btn {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      color: #475569;
      font-size: 13px;
      font-weight: 600;
      padding: 5px 12px;
      border-radius: 20px;
      cursor: pointer;
      transition: background 0.2s, color 0.2s, border-color 0.2s;
    }
    .tab-btn.active {
      background: #2563eb;
      color: #ffffff;
      border-color: #2563eb;
    }
    .row-card {
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 10px;
      padding: 10px 12px;
      display: grid;
      grid-template-columns: 74px 1fr 62px;
      align-items: center;
      gap: 8px;
      transition: border-color 0.25s, background-color 0.25s, opacity 0.25s;
    }
    .row-card.highlight {
      border-color: #2563eb;
      background: #f8faff;
    }
    .row-card.dimmed {
      opacity: 0.35;
    }
    .batch-label {
      font-size: 13px;
      font-weight: 700;
      color: #334155;
      display: flex;
      flex-direction: column;
      gap: 2px;
    }
    .scale-tag {
      font-size: 11px;
      font-weight: 700;
      color: #2563eb;
      background: #eff6ff;
      border-radius: 4px;
      padding: 1px 4px;
      width: fit-content;
    }
    .tile-area {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      align-items: center;
    }
    .batch-group {
      display: inline-flex;
      align-items: center;
      gap: 3px;
      padding: 3px 5px;
      background: #f8fafc;
      border: 1px dashed #cbd5e1;
      border-radius: 6px;
    }
    .tile-sep {
      width: 1px;
      height: 14px;
      background: #cbd5e1;
      margin: 0 1px;
    }
    .tile {
      width: 14px;
      height: 14px;
      border-radius: 3px;
      flex-shrink: 0;
    }
    .tile.blue {
      background: #2563eb;
      box-shadow: inset 0 -1px 0 rgba(0,0,0,0.15);
    }
    .tile.yellow {
      background: #eab308;
      box-shadow: inset 0 -1px 0 rgba(0,0,0,0.15);
    }
    .ratio-val {
      text-align: right;
      font-size: 16px;
      font-weight: 800;
      letter-spacing: -0.5px;
      white-space: nowrap;
    }
    .b-num { color: #2563eb; }
    .y-num { color: #ca8a04; }
    .colon { color: #94a3b8; font-weight: 600; margin: 0 1px; }

    .multiplier-overlay {
      display: flex;
      justify-content: flex-end;
      padding-right: 4px;
      gap: 12px;
      font-size: 12px;
      font-weight: 700;
      color: #64748b;
    }
  </style>
</head>
<body>
  <div class="diagram">
    <div class="nav-bar">
      <button class="tab-btn active" onclick="setStep(0)">All</button>
      <button class="tab-btn" onclick="setStep(1)">1 Batch</button>
      <button class="tab-btn" onclick="setStep(2)">2 Batches</button>
      <button class="tab-btn" onclick="setStep(3)">3 Batches</button>
    </div>

    
    <div class="row-card" id="row-1">
      <div class="batch-label">
        <span>1 Batch</span>
        <span class="scale-tag">Base</span>
      </div>
      <div class="tile-area">
        <div class="batch-group">
          <div class="tile blue"></div>
          <div class="tile blue"></div>
          <div class="tile-sep"></div>
          <div class="tile yellow"></div>
          <div class="tile yellow"></div>
          <div class="tile yellow"></div>
        </div>
      </div>
      <div class="ratio-val">
        <span class="b-num">2</span><span class="colon">:</span><span class="y-num">3</span>
      </div>
    </div>

    
    <div class="row-card" id="row-2">
      <div class="batch-label">
        <span>2 Batches</span>
        <span class="scale-tag">× 2</span>
      </div>
      <div class="tile-area">
        <div class="batch-group">
          <div class="tile blue"></div>
          <div class="tile blue"></div>
          <div class="tile-sep"></div>
          <div class="tile yellow"></div>
          <div class="tile yellow"></div>
          <div class="tile yellow"></div>
        </div>
        <div class="batch-group">
          <div class="tile blue"></div>
          <div class="tile blue"></div>
          <div class="tile-sep"></div>
          <div class="tile yellow"></div>
          <div class="tile yellow"></div>
          <div class="tile yellow"></div>
        </div>
      </div>
      <div class="ratio-val">
        <span class="b-num">4</span><span class="colon">:</span><span class="y-num">6</span>
      </div>
    </div>

    
    <div class="row-card" id="row-3">
      <div class="batch-label">
        <span>3 Batches</span>
        <span class="scale-tag">× 3</span>
      </div>
      <div class="tile-area">
        <div class="batch-group">
          <div class="tile blue"></div>
          <div class="tile blue"></div>
          <div class="tile-sep"></div>
          <div class="tile yellow"></div>
          <div class="tile yellow"></div>
          <div class="tile yellow"></div>
        </div>
        <div class="batch-group">
          <div class="tile blue"></div>
          <div class="tile blue"></div>
          <div class="tile-sep"></div>
          <div class="tile yellow"></div>
          <div class="tile yellow"></div>
          <div class="tile yellow"></div>
        </div>
        <div class="batch-group">
          <div class="tile blue"></div>
          <div class="tile blue"></div>
          <div class="tile-sep"></div>
          <div class="tile yellow"></div>
          <div class="tile yellow"></div>
          <div class="tile yellow"></div>
        </div>
      </div>
      <div class="ratio-val">
        <span class="b-num">6</span><span class="colon">:</span><span class="y-num">9</span>
      </div>
    </div>
  </div>

  <script>
    function setStep(step) {
      const btns = document.querySelectorAll('.tab-btn');
      btns.forEach((b, i) => b.classList.toggle('active', i === step));

      const rows = [
        document.getElementById('row-1'),
        document.getElementById('row-2'),
        document.getElementById('row-3')
      ];

      rows.forEach((row, i) => {
        row.classList.remove('dimmed', 'highlight');
        if (step === 0) {
          // show all normally
        } else if (step === i + 1) {
          row.classList.add('highlight');
        } else {
          row.classList.add('dimmed');
        }
      });
    }
  </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;
      background: transparent;
      color: #0f172a;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
      padding: 16px;
      user-select: none;
    }

    .diagram {
      width: 100%;
      max-width: 580px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
    }

    /* Comparison Row */
    .row-comparison {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      width: 100%;
    }

    /* Scoop Groups */
    .group-card {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 14px 10px;
      border-radius: 18px;
      transition: transform 0.2s ease;
    }

    .group-blue {
      background: #eff6ff;
      border: 1px solid #dbeafe;
    }

    .group-yellow {
      background: #fefce8;
      border: 1px solid #fef08a;
    }

    .group-title {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 12px;
      text-align: center;
      letter-spacing: -0.01em;
    }

    .title-blue {
      color: #1e3a8a;
    }

    .title-yellow {
      color: #854d0e;
    }

    .counters-wrap {
      display: flex;
      gap: 8px;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      flex-wrap: wrap;
    }

    .counter {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
      color: #ffffff;
      box-shadow: 0 3px 6px rgba(0, 0, 0, 0.12), inset 0 2px 3px rgba(255, 255, 255, 0.35);
      position: relative;
    }

    .counter-blue {
      background: linear-gradient(145deg, #3b82f6, #2563eb);
      border: 2.5px solid #1d4ed8;
      text-shadow: 0 1px 2px rgba(29, 78, 216, 0.6);
    }

    .counter-yellow {
      background: linear-gradient(145deg, #facc15, #eab308);
      border: 2.5px solid #ca8a04;
      color: #713f12;
      text-shadow: 0 1px 1px rgba(255, 255, 255, 0.6);
    }

    /* Central Ratio Stack */
    .ratio-badge {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      background: #ffffff;
      border: 1.5px solid #cbd5e1;
      border-radius: 16px;
      padding: 10px 14px;
      box-shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
      gap: 6px;
      min-width: 86px;
      z-index: 2;
    }

    .ratio-item {
      font-size: 15px;
      font-weight: 800;
      color: #0f172a;
      line-height: 1;
    }

    .ratio-divider {
      width: 100%;
      height: 1px;
      background: #e2e8f0;
    }

    .ratio-fraction {
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      vertical-align: middle;
      font-size: 14px;
      font-weight: 800;
      line-height: 1;
    }

    .ratio-fraction .frac-bar {
      width: 16px;
      height: 2px;
      background: #0f172a;
      margin: 2px 0;
      border-radius: 1px;
    }

    /* Bracket & Whole Section */
    .whole-section {
      width: 100%;
      display: flex;
      flex-direction: column;
      align-items: center;
      margin-top: -2px;
    }

    .bracket-svg {
      width: 88%;
      max-width: 480px;
      height: 26px;
      display: block;
    }

    .whole-badge {
      margin-top: 4px;
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      color: #334155;
      font-size: 14px;
      font-weight: 700;
      padding: 6px 16px;
      border-radius: 20px;
      letter-spacing: -0.01em;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
    }

    .whole-badge span {
      color: #0f172a;
      font-weight: 800;
    }

    @media (max-width: 420px) {
      .group-title { font-size: 13px; }
      .counter { width: 38px; height: 38px; font-size: 14px; }
      .ratio-badge { padding: 8px 10px; min-width: 74px; gap: 5px; }
      .ratio-item { font-size: 13px; }
      .whole-badge { font-size: 13px; padding: 5px 12px; }
      .bracket-svg { width: 94%; }
    }
  </style>
</head>
<body>

  <div class="diagram">
    
    <div class="row-comparison">
      
      <div class="group-card group-blue">
        <div class="group-title title-blue">2 Blue Scoops</div>
        <div class="counters-wrap">
          <div class="counter counter-blue">1</div>
          <div class="counter counter-blue">2</div>
        </div>
      </div>

      
      <div class="ratio-badge">
        <div class="ratio-item">2 to 3</div>
        <div class="ratio-divider"></div>
        <div class="ratio-item">2 : 3</div>
        <div class="ratio-divider"></div>
        <div class="ratio-fraction">
          <span>2</span>
          <span class="frac-bar"></span>
          <span>3</span>
        </div>
      </div>

      
      <div class="group-card group-yellow">
        <div class="group-title title-yellow">3 Yellow Scoops</div>
        <div class="counters-wrap">
          <div class="counter counter-yellow">1</div>
          <div class="counter counter-yellow">2</div>
          <div class="counter counter-yellow">3</div>
        </div>
      </div>
    </div>

    
    <div class="whole-section">
      <svg class="bracket-svg" viewBox="0 0 400 24" fill="none" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="none">
        <path d="M 10,2 C 10,12 180,12 190,14 C 196,16 198,22 200,23 C 202,22 204,16 210,14 C 220,12 390,12 390,2" 
              stroke="#94a3b8" 
              stroke-width="2.5" 
              stroke-linecap="round" 
              fill="none" />
      </svg>
      <div class="whole-badge">
        Whole Recipe: <span>5 Total Scoops</span>
      </div>
    </div>
  </div>

</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;
      background: transparent;
      color: #1e293b;
      padding: 10px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      min-height: 100%;
    }
    .grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 12px;
      width: 100%;
    }
    .panel {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 14px 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      cursor: pointer;
      user-select: none;
      transition: box-shadow 0.2s ease, border-color 0.2s ease;
    }
    .panel:hover {
      border-color: #cbd5e1;
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }
    .panel.active {
      border-color: #3b82f6;
      box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
    }
    .title {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .model-area {
      height: 80px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      margin-bottom: 10px;
      width: 100%;
    }
    .squares-row {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
    }
    .group-gap {
      margin-right: 12px;
    }
    .sq {
      width: 32px;
      height: 32px;
      border-radius: 6px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 13px;
      transition: transform 0.2s ease, opacity 0.2s ease;
    }
    .sq-blue {
      background-color: #3b82f6;
      border: 1.5px solid #2563eb;
      color: #ffffff;
    }
    .sq-yellow {
      background-color: #facc15;
      border: 1.5px solid #eab308;
      color: #713f12;
    }
    .strip {
      display: flex;
      padding: 3px;
      background: #f8fafc;
      border: 2px dashed #94a3b8;
      border-radius: 8px;
      gap: 3px;
    }
    .strip .sq {
      border-radius: 4px;
      border-width: 1px;
    }
    .ratio-box {
      background: #f8fafc;
      border-radius: 8px;
      padding: 8px 12px;
      width: 100%;
      border: 1px solid #f1f5f9;
    }
    .ratio-math {
      font-size: 15px;
      font-weight: 700;
      color: #1e293b;
    }
    .ratio-sub {
      font-size: 13px;
      font-weight: 600;
      color: #64748b;
      margin-top: 2px;
    }
    .blue-txt { color: #2563eb; }
    .yellow-txt { color: #b45309; }
    .total-txt { color: #0f172a; }
    .fraction {
      display: inline-block;
      vertical-align: middle;
      font-size: 13px;
    }
  </style>
</head>
<body>

  <div class="grid">
    
    <div class="panel" id="panelPart">
      <div class="title">Part to Part</div>
      
      <div class="model-area">
        <div class="squares-row">
          <div class="squares-row group-gap">
            <div class="sq sq-blue">1</div>
            <div class="sq sq-blue">2</div>
          </div>
          <div class="squares-row">
            <div class="sq sq-yellow">1</div>
            <div class="sq sq-yellow">2</div>
            <div class="sq sq-yellow">3</div>
          </div>
        </div>
      </div>

      <div class="ratio-box">
        <div class="ratio-math">
          <span class="blue-txt">2</span> : <span class="yellow-txt">3</span>
        </div>
        <div class="ratio-sub">Blue to Yellow</div>
      </div>
    </div>

    
    <div class="panel" id="panelWhole">
      <div class="title">Part to Whole</div>
      
      <div class="model-area">
        <div class="strip">
          <div class="sq sq-blue">1</div>
          <div class="sq sq-blue">2</div>
          <div class="sq sq-yellow">3</div>
          <div class="sq sq-yellow">4</div>
          <div class="sq sq-yellow">5</div>
        </div>
      </div>

      <div class="ratio-box">
        <div class="ratio-math">
          <span class="blue-txt">2</span> : <span class="total-txt">5</span> 
          <span class="fraction">(or <sup>2</sup>/<sub>5</sub>)</span>
        </div>
        <div class="ratio-sub">Blue to Total</div>
      </div>
    </div>
  </div>

  <script>
    const pPart = document.getElementById('panelPart');
    const pWhole = document.getElementById('panelWhole');

    pPart.addEventListener('click', () => {
      pPart.classList.add('active');
      pWhole.classList.remove('active');
    });

    pWhole.addEventListener('click', () => {
      pWhole.classList.add('active');
      pPart.classList.remove('active');
    });
  </script>
</body>
</html>

111.26(b)(4)(E)

Aligned learning resources

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