<!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>Fraction Comparison: 3/8 vs 5/12</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e293b;
      background: transparent;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 16px;
      justify-content: center;
      min-height: 100%;
    }

    /* Common Math Fraction Stacking */
    .frac {
      display: inline-flex;
      flex-direction: column;
      vertical-align: middle;
      text-align: center;
      font-weight: 700;
      line-height: 1;
      font-size: 1.15rem;
    }
    .frac .num {
      padding-bottom: 2px;
      border-bottom: 2px solid currentColor;
    }
    .frac .den {
      padding-top: 2px;
    }

    .frac-lg {
      font-size: 1.35rem;
    }

    /* TOP SECTION: Conversion Pathways */
    .pathways-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      width: 100%;
    }

    .pathway {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 8px;
      border-radius: 12px;
    }

    .pathway-blue {
      background: #eff6ff;
      color: #1d4ed8;
      border: 1px solid #bfdbfe;
    }

    .pathway-purple {
      background: #f5f3ff;
      color: #6d28d9;
      border: 1px solid #ddd6fe;
    }

    .multiplier-col {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 2px;
    }

    .multiplier-badge {
      font-size: 0.72rem;
      font-weight: 800;
      padding: 1px 5px;
      border-radius: 4px;
      letter-spacing: -0.2px;
    }

    .badge-blue {
      background: #dbeafe;
      color: #1e40af;
    }

    .badge-purple {
      background: #ede9fe;
      color: #5b21b6;
    }

    .arrow-svg {
      width: 28px;
      height: 14px;
    }

    /* MIDDLE SECTION: 24-Segment Fraction Bars */
    .bars-container {
      display: flex;
      flex-direction: column;
      gap: 12px;
      position: relative;
      padding: 4px 0 10px;
    }

    .bar-row {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .bar-label {
      width: 48px;
      flex-shrink: 0;
      text-align: right;
    }

    .bar-track {
      flex: 1;
      display: grid;
      grid-template-columns: repeat(24, 1fr);
      height: 28px;
      background: #e2e8f0;
      border-radius: 6px;
      overflow: hidden;
      gap: 1px;
      padding: 1px;
      background-color: #cbd5e1;
    }

    .seg {
      background: #e2e8f0;
      height: 100%;
      border-radius: 1px;
    }

    /* Blue segments */
    .seg-blue {
      background: #3b82f6;
    }

    /* Purple segments */
    .seg-purple {
      background: #8b5cf6;
    }

    /* Extra +1/24 highlighted segment */
    .seg-extra {
      background: #a855f7;
      position: relative;
      box-shadow: inset 0 0 0 2px #f59e0b;
      animation: pulse-border 2s infinite ease-in-out;
    }

    @keyframes pulse-border {
      0%, 100% { box-shadow: inset 0 0 0 2px #f59e0b; }
      50% { box-shadow: inset 0 0 0 2px #fbbf24, 0 0 6px rgba(245, 158, 11, 0.6); }
    }

    /* Diff indicator overlay */
    .diff-callout-wrap {
      display: flex;
      align-items: center;
      margin-left: 58px; /* Offset for bar-label */
      position: relative;
      height: 18px;
    }

    .diff-bracket {
      position: absolute;
      left: 37.5%; /* 9/24 */
      width: 4.166%; /* 1/24 */
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .diff-line {
      width: 100%;
      border-bottom: 2px solid #d97706;
      border-left: 2px solid #d97706;
      border-right: 2px solid #d97706;
      height: 4px;
    }

    .diff-tag {
      font-size: 0.7rem;
      font-weight: 800;
      color: #b45309;
      white-space: nowrap;
      margin-top: 1px;
    }

    /* BOTTOM SECTION: Math Conclusion */
    .conclusion {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 6px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 10px 14px;
    }

    .math-statement {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 800;
    }

    .comp-symbol {
      color: #0f172a;
      font-size: 1.4rem;
    }

    .arrow-trans {
      color: #64748b;
      font-weight: 700;
      font-size: 1.2rem;
    }

    .c-blue {
      color: #2563eb;
    }

    .c-purple {
      color: #7c3aed;
    }

    .caption {
      font-size: 0.8rem;
      font-weight: 600;
      color: #475569;
    }

    @media (max-width: 420px) {
      body {
        padding: 6px;
        gap: 10px;
      }
      .pathway {
        padding: 6px 4px;
        gap: 4px;
      }
      .frac {
        font-size: 1rem;
      }
      .frac-lg {
        font-size: 1.15rem;
      }
      .arrow-svg {
        width: 20px;
      }
      .bar-label {
        width: 38px;
      }
      .diff-callout-wrap {
        margin-left: 48px;
      }
      .math-statement {
        gap: 8px;
      }
    }
  </style>
</head>
<body>

  
  <div class="pathways-grid">
    
    
    <div class="pathway pathway-blue">
      <div class="frac">
        <span class="num">3</span>
        <span class="den">8</span>
      </div>

      <div class="multiplier-col">
        <span class="multiplier-badge badge-blue">×3</span>
        <svg class="arrow-svg" viewBox="0 0 28 12" fill="none">
          <path d="M1 6H24M24 6L19 2M24 6L19 10" stroke="#2563eb" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
        </svg>
        <span class="multiplier-badge badge-blue">×3</span>
      </div>

      <div class="frac">
        <span class="num">9</span>
        <span class="den">24</span>
      </div>
    </div>

    
    <div class="pathway pathway-purple">
      <div class="frac">
        <span class="num">5</span>
        <span class="den">12</span>
      </div>

      <div class="multiplier-col">
        <span class="multiplier-badge badge-purple">×2</span>
        <svg class="arrow-svg" viewBox="0 0 28 12" fill="none">
          <path d="M1 6H24M24 6L19 2M24 6L19 10" stroke="#7c3aed" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
        </svg>
        <span class="multiplier-badge badge-purple">×2</span>
      </div>

      <div class="frac">
        <span class="num">10</span>
        <span class="den">24</span>
      </div>
    </div>

  </div>

  
  <div class="bars-container">
    
    
    <div class="bar-row">
      <div class="bar-label c-blue">
        <div class="frac">
          <span class="num">9</span>
          <span class="den">24</span>
        </div>
      </div>
      <div class="bar-track" id="bar1">
        
        <div class="seg seg-blue"></div><div class="seg seg-blue"></div><div class="seg seg-blue"></div>
        <div class="seg seg-blue"></div><div class="seg seg-blue"></div><div class="seg seg-blue"></div>
        <div class="seg seg-blue"></div><div class="seg seg-blue"></div><div class="seg seg-blue"></div>
        <div class="seg"></div><div class="seg"></div><div class="seg"></div>
        <div class="seg"></div><div class="seg"></div><div class="seg"></div>
        <div class="seg"></div><div class="seg"></div><div class="seg"></div>
        <div class="seg"></div><div class="seg"></div><div class="seg"></div>
        <div class="seg"></div><div class="seg"></div><div class="seg"></div>
      </div>
    </div>

    
    <div class="bar-row">
      <div class="bar-label c-purple">
        <div class="frac">
          <span class="num">10</span>
          <span class="den">24</span>
        </div>
      </div>
      <div class="bar-track" id="bar2">
        
        <div class="seg seg-purple"></div><div class="seg seg-purple"></div><div class="seg seg-purple"></div>
        <div class="seg seg-purple"></div><div class="seg seg-purple"></div><div class="seg seg-purple"></div>
        <div class="seg seg-purple"></div><div class="seg seg-purple"></div><div class="seg seg-purple"></div>
        <div class="seg seg-extra" title="+1/24 extra part"></div>
        <div class="seg"></div><div class="seg"></div><div class="seg"></div>
        <div class="seg"></div><div class="seg"></div><div class="seg"></div>
        <div class="seg"></div><div class="seg"></div><div class="seg"></div>
        <div class="seg"></div><div class="seg"></div><div class="seg"></div>
        <div class="seg"></div><div class="seg"></div>
      </div>
    </div>

    
    <div class="diff-callout-wrap">
      <div class="diff-bracket">
        <div class="diff-line"></div>
        <span class="diff-tag">+<span style="font-size:0.65rem">1</span>/<span style="font-size:0.65rem">24</span></span>
      </div>
    </div>

  </div>

  
  <div class="conclusion">
    <div class="math-statement">
      <span class="frac-lg c-purple"><span class="frac"><span class="num">10</span><span class="den">24</span></span></span>
      <span class="comp-symbol">&gt;</span>
      <span class="frac-lg c-blue"><span class="frac"><span class="num">9</span><span class="den">24</span></span></span>
      <span class="arrow-trans">➔</span>
      <span class="frac-lg c-purple"><span class="frac"><span class="num">5</span><span class="den">12</span></span></span>
      <span class="comp-symbol">&gt;</span>
      <span class="frac-lg c-blue"><span class="frac"><span class="num">3</span><span class="den">8</span></span></span>
    </div>
    <div class="caption">10 parts of <sup>1</sup>/<sub>24</sub> is greater than 9 parts of <sup>1</sup>/<sub>24</sub></div>
  </div>

</body>
</html>

Justifying Fraction Comparisons with Multiple Representations

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html, body {
      width: 100%;
      height: 100%;
      background: #ffffff;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      display: flex;
      align-items: center;
      justify-content: center;
      user-select: none;
      overflow: hidden;
    }
    .diagram-container {
      width: 100%;
      max-width: 620px;
      padding: 8px 12px;
      display: flex;
      justify-content: center;
    }
    .diagram-svg {
      width: 100%;
      height: auto;
      display: block;
    }
    .interactive-group {
      cursor: pointer;
      transition: filter 0.2s ease, opacity 0.2s ease;
    }
    .interactive-group:hover {
      filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.12));
    }
    .interactive-group:hover .card-bg {
      stroke-width: 2px;
    }
  </style>
</head>
<body>
  <div class="diagram-container">
    <svg class="diagram-svg" viewBox="0 0 620 260" preserveAspectRatio="xMidYMid meet">
      <defs>
        <filter id="card-shadow" x="-10%" y="-10%" width="120%" height="125%">
          <feDropShadow dx="0" dy="2" stdDeviation="3" flood-color="#0f172a" flood-opacity="0.07" />
        </filter>
        <filter id="badge-shadow" x="-10%" y="-10%" width="120%" height="125%">
          <feDropShadow dx="0" dy="1.5" stdDeviation="2" flood-color="#312e81" flood-opacity="0.12" />
        </filter>
      </defs>

      
      <line x1="310" y1="52" x2="310" y2="135" stroke="#cbd5e1" stroke-width="1.5" stroke-dasharray="3 3" />

      
      
      <path d="M 283.3 64 
               C 283.3 46, 316.7 48, 316.7 32 
               C 316.7 48, 350.0 46, 350.0 64" 
            fill="none" stroke="#6366f1" stroke-width="2.5" stroke-linecap="round" />

      
      <g transform="translate(316.7, 22)" filter="url(#badge-shadow)">
        <rect x="-62" y="-14" width="124" height="28" rx="14" fill="#eef2ff" stroke="#c7d2fe" stroke-width="1.5" />
        <text x="0" y="4.5" text-anchor="middle" font-size="14" font-weight="700" fill="#4338ca">
          <tspan fill="#e11d48">4/9</tspan>
          <tspan fill="#4338ca"> &lt; </tspan>
          <tspan fill="#16a34a">7/12</tspan>
        </text>
      </g>

      
      
      
      <line x1="45" y1="95" x2="575" y2="95" stroke="#e2e8f0" stroke-width="6" stroke-linecap="round" />

      
      
      <line x1="70" y1="95" x2="310" y2="95" stroke="#fecdd3" stroke-width="5" />
      
      <line x1="310" y1="95" x2="550" y2="95" stroke="#bbf7d0" stroke-width="5" />

      
      <line x1="70" y1="95" x2="550" y2="95" stroke="#1e2945" stroke-width="2" />

      
      <line x1="70" y1="84" x2="70" y2="106" stroke="#1e2945" stroke-width="2.5" stroke-linecap="round" />
      <text x="70" y="125" text-anchor="middle" font-size="15" font-weight="600" fill="#64748b">0</text>

      
      <line x1="550" y1="84" x2="550" y2="106" stroke="#1e2945" stroke-width="2.5" stroke-linecap="round" />
      <text x="550" y="125" text-anchor="middle" font-size="15" font-weight="600" fill="#64748b">1</text>

      
      <line x1="310" y1="80" x2="310" y2="110" stroke="#2563eb" stroke-width="3" stroke-linecap="round" />
      <g transform="translate(310, 126)">
        <rect x="-18" y="-11" width="36" height="22" rx="5" fill="#eff6ff" stroke="#bfdbfe" stroke-width="1.2" />
        <text x="0" y="4" text-anchor="middle" font-size="13" font-weight="700" fill="#1d4ed8">1/2</text>
      </g>

      
      
      <g class="interactive-group" id="group-49">
        
        <line x1="283.3" y1="66" x2="283.3" y2="95" stroke="#e11d48" stroke-width="1.5" stroke-dasharray="2 2" />
        
        
        <circle cx="283.3" cy="95" r="5.5" fill="#e11d48" stroke="#ffffff" stroke-width="2" />
        
        
        <path d="M 283.3 103 L 235 152 L 275 152 Q 275 152 275 152 L 275 240 Q 275 246 269 246 L 51 246 Q 45 246 45 240 L 45 158 Q 45 152 51 152 L 205 152 Z" 
              class="card-bg" fill="#fff1f2" stroke="#fecdd3" stroke-width="1.2" filter="url(#card-shadow)" />

        <text x="160" y="176" text-anchor="middle" font-size="14" font-weight="700" fill="#be123c">
          4/9 &lt; 1/2
        </text>
        <text x="160" y="198" text-anchor="middle" font-size="12.5" font-weight="600" fill="#9f1239">
          since 4 &lt; 4.5
        </text>
        <text x="160" y="222" text-anchor="middle" font-size="11" font-weight="500" fill="#be123c" opacity="0.85">
          (4.5 is half of 9)
        </text>
      </g>

      
      
      <g class="interactive-group" id="group-712">
        
        <line x1="350.0" y1="66" x2="350.0" y2="95" stroke="#16a34a" stroke-width="1.5" stroke-dasharray="2 2" />
        
        
        <circle cx="350.0" cy="95" r="5.5" fill="#16a34a" stroke="#ffffff" stroke-width="2" />
        
        
        <path d="M 350 103 L 385 152 L 345 152 Q 345 152 345 152 L 345 240 Q 345 246 351 246 L 569 246 Q 575 246 575 240 L 575 158 Q 575 152 569 152 L 415 152 Z" 
              class="card-bg" fill="#f0fdf4" stroke="#bbf7d0" stroke-width="1.2" filter="url(#card-shadow)" />

        <text x="460" y="176" text-anchor="middle" font-size="14" font-weight="700" fill="#15803d">
          7/12 &gt; 1/2
        </text>
        <text x="460" y="198" text-anchor="middle" font-size="12.5" font-weight="600" fill="#14532d">
          since 7 &gt; 6
        </text>
        <text x="460" y="222" text-anchor="middle" font-size="11" font-weight="500" fill="#15803d" opacity="0.85">
          (6 is half of 12)
        </text>
      </g>
    </svg>
  </div>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>b6</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      width: 100%;
      min-height: 100%;
      background: #ffffff;
      color: #1e2945;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 16px 12px;
      gap: 14px;
    }
    .diagram-area {
      width: 100%;
      max-width: 520px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      position: relative;
    }
    .bar-row {
      display: flex;
      flex-direction: column;
      gap: 5px;
      position: relative;
      z-index: 2;
    }
    .bar-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 700;
      font-size: 14px;
    }
    .fraction-title {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .badge {
      font-size: 11px;
      font-weight: 600;
      padding: 2px 6px;
      border-radius: 4px;
    }
    .badge-blue { background: #e0f2fe; color: #0284c7; }
    .badge-green { background: #dcfce7; color: #16a34a; }

    .bar-track {
      position: relative;
      width: 100%;
      height: 44px;
      display: flex;
      background: #ffffff;
      border: 2px solid #e6e6e6;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 1px 2px rgba(0,0,0,0.04);
    }
    .segment {
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      font-weight: 700;
      border-right: 1.5px solid rgba(255, 255, 255, 0.45);
      position: relative;
      z-index: 3;
      user-select: none;
      transition: opacity 0.25s ease, background-color 0.25s ease, color 0.25s ease;
    }
    .segment:last-child {
      border-right: none;
    }

    /* 4-part bar */
    .bar-4 .seg-shaded {
      width: 25%;
      background: #0ea5e9;
      color: #ffffff;
    }
    .bar-4 .seg-missing {
      width: 25%;
      background: #f8fafc;
      color: #64748b;
      font-size: 12px;
      font-weight: 600;
      border-left: 2px dashed #cbd5e1;
      white-space: nowrap;
      padding: 0 2px;
    }

    /* 6-part bar */
    .bar-6 .seg-shaded {
      width: 16.666%;
      background: #22c55e;
      color: #ffffff;
    }
    .bar-6 .seg-missing {
      width: 16.666%;
      background: #f8fafc;
      color: #64748b;
      font-size: 11px;
      font-weight: 600;
      border-left: 2px dashed #cbd5e1;
      white-space: nowrap;
      padding: 0 1px;
      letter-spacing: -0.2px;
    }

    /* Comparison Connector Section in between the bars */
    .comparison-zone {
      position: relative;
      height: 28px;
      width: 100%;
      display: flex;
      align-items: center;
    }
    .guide-line {
      position: absolute;
      top: -4px;
      bottom: -4px;
      width: 0;
      border-left: 2px dashed #d97706;
      z-index: 1;
      pointer-events: none;
    }
    .guide-3-4 {
      left: 75%;
    }
    .guide-5-6 {
      left: 83.333%;
    }
    .diff-span {
      position: absolute;
      left: 75%;
      width: 8.333%;
      top: 3px;
      bottom: 3px;
      background: rgba(245, 158, 11, 0.15);
      border-top: 1.5px solid #d97706;
      border-bottom: 1.5px solid #d97706;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 10px;
      font-weight: 700;
      color: #b45309;
      pointer-events: none;
    }
    .diff-label {
      position: absolute;
      left: 75%;
      transform: translateX(-50%);
      font-size: 10px;
      font-weight: 700;
      color: #b45309;
      background: #fef3c7;
      padding: 1px 4px;
      border-radius: 3px;
      white-space: nowrap;
    }
    .diff-label-right {
      position: absolute;
      left: 83.333%;
      transform: translateX(-50%);
      font-size: 10px;
      font-weight: 700;
      color: #15803d;
      background: #dcfce7;
      padding: 1px 4px;
      border-radius: 3px;
      white-space: nowrap;
    }

    .callout {
      width: 100%;
      max-width: 520px;
      background: #f8fafc;
      border: 1.5px solid #e6e6e6;
      border-left: 4px solid #0ea5e9;
      border-radius: 6px;
      padding: 9px 12px;
      font-size: 13px;
      font-weight: 700;
      color: #1e2945;
      text-align: center;
      line-height: 1.4;
    }
    .callout span.hl {
      color: #0284c7;
      font-weight: 800;
    }

    .interactive-panel {
      display: flex;
      gap: 8px;
      justify-content: center;
      width: 100%;
      max-width: 520px;
    }
    .btn-toggle {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      color: #1e2945;
      padding: 6px 12px;
      font-size: 12px;
      font-weight: 600;
      border-radius: 6px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 5px;
      transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
    }
    .btn-toggle:hover {
      background: #f1f5f9;
    }
    .btn-toggle.active {
      background: #1e2945;
      border-color: #1e2945;
      color: #ffffff;
    }

    /* Missing Highlight Mode */
    .highlight-missing .seg-shaded {
      opacity: 0.3;
    }
    .highlight-missing .seg-missing {
      background: #fee2e2;
      color: #b91c1c;
      border-left-color: #f87171;
      font-weight: 700;
    }
    .highlight-missing .callout {
      border-left-color: #ef4444;
    }

    /* Responsive adjustments for narrow screens (350px) */
    @media (max-width: 420px) {
      body {
        padding: 10px 8px;
        gap: 10px;
      }
      .diagram-area {
        gap: 8px;
      }
      .bar-header {
        font-size: 12.5px;
      }
      .badge {
        font-size: 10px;
        padding: 1px 4px;
      }
      .bar-track {
        height: 38px;
      }
      .segment {
        font-size: 11px;
      }
      .bar-4 .seg-missing {
        font-size: 10.5px;
        padding: 0 1px;
      }
      .bar-6 .seg-missing {
        font-size: 9.5px;
        letter-spacing: -0.4px;
        padding: 0 1px;
      }
      .comparison-zone {
        height: 22px;
      }
      .callout {
        font-size: 11.5px;
        padding: 7px 8px;
      }
      .btn-toggle {
        font-size: 11.5px;
        padding: 5px 10px;
      }
    }
  </style>
</head>
<body>

  <div class="diagram-area" id="diagram">
    
    <div class="bar-row">
      <div class="bar-header">
        <div class="fraction-title">
          <span>3/4</span>
          <span class="badge badge-blue">3 of 4 equal parts</span>
        </div>
      </div>
      <div class="bar-track bar-4">
        <div class="segment seg-shaded">1/4</div>
        <div class="segment seg-shaded">1/4</div>
        <div class="segment seg-shaded">1/4</div>
        <div class="segment seg-missing">Missing 1/4</div>
      </div>
    </div>

    
    <div class="comparison-zone">
      <div class="guide-line guide-3-4" title="3/4 mark"></div>
      <div class="guide-line guide-5-6" title="5/6 mark"></div>
      <div class="diff-span" title="Difference: 5/6 is longer by 1/12"></div>
      <div class="diff-label">3/4</div>
      <div class="diff-label-right">5/6</div>
    </div>

    
    <div class="bar-row">
      <div class="bar-header">
        <div class="fraction-title">
          <span>5/6</span>
          <span class="badge badge-green">5 of 6 equal parts</span>
        </div>
      </div>
      <div class="bar-track bar-6">
        <div class="segment seg-shaded">1/6</div>
        <div class="segment seg-shaded">1/6</div>
        <div class="segment seg-shaded">1/6</div>
        <div class="segment seg-shaded">1/6</div>
        <div class="segment seg-shaded">1/6</div>
        <div class="segment seg-missing">Missing 1/6</div>
      </div>
    </div>
  </div>

  <div class="callout" id="calloutText">
    <b>Smaller missing piece</b> (<span class="hl">1/6 &lt; 1/4</span>) = <b>Larger fraction remaining</b> (<span class="hl">5/6 &gt; 3/4</span>)
  </div>

  <div class="interactive-panel">
    <button class="btn-toggle active" id="btnCompare">Compare Bars</button>
    <button class="btn-toggle" id="btnMissing">Compare Missing Pieces</button>
  </div>

  <script>
    const diagram = document.getElementById('diagram');
    const btnCompare = document.getElementById('btnCompare');
    const btnMissing = document.getElementById('btnMissing');
    const callout = document.getElementById('calloutText');

    btnCompare.addEventListener('click', () => {
      btnCompare.classList.add('active');
      btnMissing.classList.remove('active');
      diagram.classList.remove('highlight-missing');
      callout.innerHTML = '<b>Smaller missing piece</b> (<span class="hl">1/6 &lt; 1/4</span>) = <b>Larger fraction remaining</b> (<span class="hl">5/6 &gt; 3/4</span>)';
    });

    btnMissing.addEventListener('click', () => {
      btnMissing.classList.add('active');
      btnCompare.classList.remove('active');
      diagram.classList.add('highlight-missing');
      callout.innerHTML = 'Missing piece for <b>5/6</b> is only <b>1/6</b>, while <b>3/4</b> misses a larger <b>1/4</b> piece.';
    });
  </script>
</body>
</html>

Classifying Whole Numbers, Integers, and Rational Numbers

Using Venn Diagrams to Show Number Set Relationships

Describing Relationships Between Number Sets

Identifying a Number and Its Opposite

Understanding Absolute Value on a Number Line

Opposites and Absolute Value in Real-World Contexts

Locating Integers on a Number Line

Locating Rational Numbers on a Number Line

math

Classifying and Locating Numbers on Number Lines

Fraction Comparison in Real-World Problems

Multiplying and Dividing Rational Numbers in Word Problems

Mixed Operations with Rational Numbers: Real-World Problems

Applying Rational Number Operations and Comparisons

Understanding Additive Relationships (y = x + a)

Understanding Multiplicative Relationships (y = ax)

Comparing Additive and Multiplicative Relationships Verbally

Comparing Additive and Multiplicative Relationships in Tables

Comparing Additive and Multiplicative Relationships Graphically

Comparing Additive and Multiplicative Relationships Symbolically

Differentiating Additive and Multiplicative Relationships Across All Representations

111.26(b)(1)(G)

Aligned learning resources

Related diagrams