<!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: #1e293b;
      background: transparent;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
    }

    .container {
      width: 100%;
      max-width: 650px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .panels {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 16px;
      width: 100%;
    }

    .panel {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
    }

    .panel-title {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.6px;
      padding: 4px 12px;
      border-radius: 20px;
    }

    .panel-mult .panel-title {
      background: #eff6ff;
      color: #1d4ed8;
    }

    .panel-div .panel-title {
      background: #ecfdf5;
      color: #047857;
    }

    .model-area {
      width: 100%;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      padding: 4px 0;
    }

    /* Top Bracket & Label */
    .bracket-wrap {
      width: 100%;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .bracket-label {
      font-size: 14px;
      font-weight: 700;
      color: #1e293b;
      margin-bottom: 2px;
    }

    .bracket-label i, .math-var {
      font-family: "Cambria Math", "Times New Roman", serif;
      font-style: italic;
      font-weight: 600;
    }

    .bracket-svg {
      width: 100%;
      height: 12px;
      display: block;
    }

    /* Strip Bars */
    .strip-row {
      display: flex;
      width: 100%;
      height: 48px;
      gap: 4px;
    }

    .box {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      font-weight: 700;
      border-radius: 6px;
      user-select: none;
      transition: background-color 0.15s ease;
    }

    .box-mult {
      background: #dbeafe;
      color: #1d4ed8;
      border: 2px solid #93c5fd;
    }

    .box-mult:hover {
      background: #bfdbfe;
    }

    .box-div {
      background: #f1f5f9;
      color: #94a3b8;
      border: 2px solid #cbd5e1;
    }

    .box-div.highlight {
      background: #a7f3d0;
      color: #065f46;
      border: 2px solid #34d399;
      font-weight: 800;
    }

    /* Equation Display */
    .eq-card {
      width: 100%;
      background: #f8fafc;
      border-radius: 8px;
      padding: 8px 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 46px;
    }

    .math-eq {
      font-family: "Cambria Math", "Times New Roman", serif;
      font-size: 20px;
      color: #0f172a;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .fraction {
      display: inline-flex;
      flex-direction: column;
      vertical-align: middle;
      text-align: center;
      padding: 0 4px;
      font-size: 0.95em;
      line-height: 1.05;
    }

    .fraction .num {
      border-bottom: 1.5px solid #0f172a;
      padding-bottom: 1px;
    }

    .fraction .den {
      padding-top: 1px;
    }

    .hint-text {
      font-size: 12px;
      color: #64748b;
      text-align: center;
      line-height: 1.3;
    }
  </style>
</head>
<body>

<div class="container">
  <div class="panels">
    
    <div class="panel panel-mult">
      <div class="panel-title">Multiplication</div>

      <div class="model-area">
        <div class="bracket-wrap">
          <span class="bracket-label">Total: 45 cards</span>
          <svg class="bracket-svg" viewBox="0 0 200 12" preserveAspectRatio="none">
            <path d="M 2,10 L 2,3 Q 2,2 6,2 L 95,2 Q 100,2 100,0 Q 100,2 105,2 L 194,2 Q 198,2 198,3 L 198,10" 
                  fill="none" stroke="#2563eb" stroke-width="2" stroke-linecap="round" />
          </svg>
        </div>

        <div class="strip-row">
          <div class="box box-mult"><span class="math-var">c</span></div>
          <div class="box box-mult"><span class="math-var">c</span></div>
          <div class="box box-mult"><span class="math-var">c</span></div>
          <div class="box box-mult"><span class="math-var">c</span></div>
          <div class="box box-mult"><span class="math-var">c</span></div>
        </div>
      </div>

      <div class="eq-card">
        <span class="math-eq">5<span class="math-var">c</span> = 45</span>
      </div>
      <div class="hint-text">5 equal groups of <i>c</i> equal 45</div>
    </div>

    
    <div class="panel panel-div">
      <div class="panel-title">Division</div>

      <div class="model-area">
        <div class="bracket-wrap">
          <span class="bracket-label">Total: <span class="math-var">t</span></span>
          <svg class="bracket-svg" viewBox="0 0 200 12" preserveAspectRatio="none">
            <path d="M 2,10 L 2,3 Q 2,2 6,2 L 95,2 Q 100,2 100,0 Q 100,2 105,2 L 194,2 Q 198,2 198,3 L 198,10" 
                  fill="none" stroke="#059669" stroke-width="2" stroke-linecap="round" />
          </svg>
        </div>

        <div class="strip-row">
          <div class="box box-div highlight">$12</div>
          <div class="box box-div"></div>
          <div class="box box-div"></div>
          <div class="box box-div"></div>
        </div>
      </div>

      <div class="eq-card">
        <span class="math-eq">
          <span class="fraction">
            <span class="num"><span class="math-var">t</span></span>
            <span class="den">4</span>
          </span>
          = 12
        </span>
      </div>
      <div class="hint-text">Total <i>t</i> split into 4 equal parts is $12</div>
    </div>
  </div>
</div>

</body>
</html>

Writing One-Step Equations from Word Problems

<!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;
      -webkit-tap-highlight-color: transparent;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #ffffff;
      color: #1e2945;
      padding: 10px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      user-select: none;
      min-height: 100%;
    }

    .header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0 2px;
      gap: 8px;
    }

    .title {
      font-size: 14px;
      font-weight: 700;
      color: #0f172a;
      letter-spacing: -0.2px;
    }

    .sub {
      font-size: 11px;
      color: #64748b;
      font-weight: 500;
      white-space: nowrap;
    }

    .grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      flex: 1;
    }

    .quad-card {
      border-radius: 10px;
      padding: 9px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      cursor: pointer;
      transition: box-shadow 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
      position: relative;
      border: 1.5px solid transparent;
      gap: 6px;
    }

    .quad-card:focus-visible {
      outline: 2px solid #22b7ff;
    }

    /* Addition - Green */
    .card-add {
      background: #f0fdf4;
      border-color: #bbf7d0;
      color: #15803d;
    }
    .card-add.active {
      border-color: #22c55e;
      box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.25);
    }

    /* Subtraction - Orange */
    .card-sub {
      background: #fff7ed;
      border-color: #fed7aa;
      color: #c2410c;
    }
    .card-sub.active {
      border-color: #f97316;
      box-shadow: 0 0 0 2px rgba(249, 115, 22, 0.25);
    }

    /* Multiplication - Blue */
    .card-mul {
      background: #eff6ff;
      border-color: #bfdbfe;
      color: #1d4ed8;
    }
    .card-mul.active {
      border-color: #3b82f6;
      box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
    }

    /* Division - Purple */
    .card-div {
      background: #faf5ff;
      border-color: #e9d5ff;
      color: #7e22ce;
    }
    .card-div.active {
      border-color: #a855f7;
      box-shadow: 0 0 0 2px rgba(168, 85, 247, 0.25);
    }

    .card-head {
      display: flex;
      align-items: center;
      gap: 6px;
      margin-bottom: 6px;
    }

    .symbol-badge {
      width: 24px;
      height: 24px;
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      font-weight: 800;
      background: #ffffff;
      box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
      flex-shrink: 0;
    }

    .card-title {
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.3px;
    }

    .clues-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 3px;
      margin-bottom: 6px;
    }

    .clue-tag {
      background: rgba(255, 255, 255, 0.9);
      font-size: 10.5px;
      font-weight: 600;
      padding: 2px 5px;
      border-radius: 4px;
      line-height: 1.25;
    }

    .eq-box {
      background: #ffffff;
      border-radius: 6px;
      padding: 5px;
      text-align: center;
      font-size: 15px;
      font-weight: 700;
      font-family: "Cambria Math", "Times New Roman", serif;
      font-style: italic;
      box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
    }

    .eq-box span {
      font-style: normal;
    }

    .preview-bar {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 10px;
      padding: 8px 10px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
      flex-wrap: wrap;
    }

    .preview-left {
      display: flex;
      align-items: center;
      gap: 6px;
      font-weight: 600;
      color: #334155;
      font-size: 12px;
      flex-wrap: wrap;
      flex: 1 1 auto;
      min-width: 0;
    }

    .preview-tag {
      padding: 2px 7px;
      border-radius: 5px;
      font-size: 10.5px;
      font-weight: 700;
      text-transform: uppercase;
      white-space: nowrap;
      flex-shrink: 0;
    }

    #previewClue {
      word-break: break-word;
    }

    .preview-eq {
      font-family: "Cambria Math", "Times New Roman", serif;
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      white-space: nowrap;
      flex-shrink: 0;
    }

    @media (max-width: 480px) {
      .preview-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
        padding: 8px;
      }

      .preview-left {
        width: 100%;
        display: flex;
        align-items: baseline;
      }

      .preview-eq {
        align-self: flex-end;
        background: #ffffff;
        padding: 2px 8px;
        border-radius: 6px;
        border: 1px solid #e2e8f0;
      }

      .title {
        font-size: 13px;
      }
    }
  </style>
</head>
<body>

  <div class="header">
    <div class="title">Clue Words → One-Step Equations</div>
    <div class="sub">Tap a quadrant</div>
  </div>

  <div class="grid">
    
    <div class="quad-card card-add active" data-op="add" tabindex="0">
      <div>
        <div class="card-head">
          <div class="symbol-badge">+</div>
          <div class="card-title">Addition</div>
        </div>
        <div class="clues-wrap">
          <div class="clue-tag">sum</div>
          <div class="clue-tag">total</div>
          <div class="clue-tag">increased by</div>
          <div class="clue-tag">more than</div>
        </div>
      </div>
      <div class="eq-box">
        <i>x</i> <span>+</span> <i>a</i> <span>=</span> <i>b</i>
      </div>
    </div>

    
    <div class="quad-card card-sub" data-op="sub" tabindex="0">
      <div>
        <div class="card-head">
          <div class="symbol-badge">−</div>
          <div class="card-title">Subtraction</div>
        </div>
        <div class="clues-wrap">
          <div class="clue-tag">difference</div>
          <div class="clue-tag">spent</div>
          <div class="clue-tag">fewer than</div>
          <div class="clue-tag">decreased by</div>
        </div>
      </div>
      <div class="eq-box">
        <i>x</i> <span>−</span> <i>a</i> <span>=</span> <i>b</i>
      </div>
    </div>

    
    <div class="quad-card card-mul" data-op="mul" tabindex="0">
      <div>
        <div class="card-head">
          <div class="symbol-badge">×</div>
          <div class="card-title">Multiplication</div>
        </div>
        <div class="clues-wrap">
          <div class="clue-tag">product</div>
          <div class="clue-tag">times</div>
          <div class="clue-tag">each</div>
          <div class="clue-tag">per</div>
        </div>
      </div>
      <div class="eq-box">
        <i>ax</i> <span>=</span> <i>b</i>
      </div>
    </div>

    
    <div class="quad-card card-div" data-op="div" tabindex="0">
      <div>
        <div class="card-head">
          <div class="symbol-badge">÷</div>
          <div class="card-title">Division</div>
        </div>
        <div class="clues-wrap">
          <div class="clue-tag">split equally</div>
          <div class="clue-tag">quotient</div>
          <div class="clue-tag">shared</div>
          <div class="clue-tag">per person</div>
        </div>
      </div>
      <div class="eq-box">
        <i>x</i> <span>/</span> <i>a</i> <span>=</span> <i>b</i>
      </div>
    </div>
  </div>

  
  <div class="preview-bar" id="previewBar">
    <div class="preview-left">
      <span class="preview-tag" id="previewTag" style="background:#dcfce7; color:#15803d;">Addition</span>
      <span id="previewClue">"5 more than a number is 12"</span>
    </div>
    <div class="preview-eq" id="previewEq">x + 5 = 12</div>
  </div>

  <script>
    const data = {
      add: {
        tag: 'Addition',
        bg: '#dcfce7',
        color: '#15803d',
        clue: '"5 more than a number is 12"',
        eq: 'x + 5 = 12'
      },
      sub: {
        tag: 'Subtraction',
        bg: '#ffedd5',
        color: '#c2410c',
        clue: '"spent $6, left with $9"',
        eq: 'x − 6 = 9'
      },
      mul: {
        tag: 'Multiplication',
        bg: '#dbeafe',
        color: '#1d4ed8',
        clue: '"4 tickets at $x each is $32"',
        eq: '4x = 32'
      },
      div: {
        tag: 'Division',
        bg: '#f3e8ff',
        color: '#7e22ce',
        clue: '"bill split equally among 3 is $8"',
        eq: 'x / 3 = 8'
      }
    };

    const cards = document.querySelectorAll('.quad-card');
    const tagEl = document.getElementById('previewTag');
    const clueEl = document.getElementById('previewClue');
    const eqEl = document.getElementById('previewEq');

    function selectOp(op) {
      cards.forEach(c => {
        c.classList.toggle('active', c.dataset.op === op);
      });
      const item = data[op];
      tagEl.textContent = item.tag;
      tagEl.style.background = item.bg;
      tagEl.style.color = item.color;
      clueEl.textContent = item.clue;
      eqEl.textContent = item.eq;
    }

    cards.forEach(card => {
      card.addEventListener('click', () => selectOp(card.dataset.op));
      card.addEventListener('keydown', (e) => {
        if (e.key === 'Enter' || e.key === ' ') {
          e.preventDefault();
          selectOp(card.dataset.op);
        }
      });
    });
  </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;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
      padding: 12px;
      user-select: none;
      -webkit-user-select: none;
    }

    .diagram-view {
      width: 100%;
      max-width: 520px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 16px;
    }

    /* SVG Balance styling */
    .scale-svg {
      width: 100%;
      height: auto;
      overflow: visible;
    }

    /* Equation strip at bottom */
    .equation-bar {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 700;
      padding: 8px 20px;
      border-radius: 12px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      transition: all 0.3s ease;
    }

    .term {
      padding: 4px 10px;
      border-radius: 8px;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: all 0.2s ease;
    }

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

    .term-eq {
      color: #0284c7;
      font-size: 26px;
    }

    .term-right {
      background: #ecfdf5;
      color: #047857;
      border: 1px solid #a7f3d0;
    }

    /* Interactive hint */
    .hint-label {
      font-size: 13px;
      color: #64748b;
      font-weight: 500;
    }

    /* Hover & tap interaction highlights */
    .interactive-group {
      cursor: pointer;
    }

    .interactive-group:hover .glow-target,
    .interactive-group.active .glow-target {
      filter: drop-shadow(0px 4px 10px rgba(34, 183, 255, 0.45));
    }
  </style>
</head>
<body>

  <div class="diagram-view">
    <svg class="scale-svg" viewBox="0 0 460 260" xmlns="http://www.w3.org/2000/svg">
      <defs>
        
        <linearGradient id="beamGrad" x1="0%" y1="0%" x2="100%" y2="0%">
          <stop offset="0%" stop-color="#94a3b8" />
          <stop offset="50%" stop-color="#cbd5e1" />
          <stop offset="100%" stop-color="#94a3b8" />
        </linearGradient>

        <linearGradient id="baseGrad" x1="0%" y1="0%" x2="0%" y2="100%">
          <stop offset="0%" stop-color="#64748b" />
          <stop offset="100%" stop-color="#334155" />
        </linearGradient>

        <linearGradient id="boxGrad" x1="0%" y1="0%" x2="0%" y2="100%">
          <stop offset="0%" stop-color="#3b82f6" />
          <stop offset="100%" stop-color="#1d4ed8" />
        </linearGradient>

        <linearGradient id="tagGrad" x1="0%" y1="0%" x2="0%" y2="100%">
          <stop offset="0%" stop-color="#f97316" />
          <stop offset="100%" stop-color="#ea580c" />
        </linearGradient>

        <linearGradient id="billGrad" x1="0%" y1="0%" x2="0%" y2="100%">
          <stop offset="0%" stop-color="#10b981" />
          <stop offset="100%" stop-color="#059669" />
        </linearGradient>

        
        <filter id="shadow" x="-10%" y="-10%" width="120%" height="130%">
          <feDropShadow dx="0" dy="3" stdDeviation="3" flood-opacity="0.12" />
        </filter>
      </defs>

      
      
      <ellipse cx="230" cy="245" rx="80" ry="10" fill="#e2e8f0" />
      <path d="M 175 240 Q 230 236 285 240 L 295 248 Q 230 254 165 248 Z" fill="#cbd5e1" />
      <polygon points="216,242 244,242 236,110 224,110" fill="url(#baseGrad)" />

      
      <rect x="50" y="104" width="360" height="10" rx="5" fill="url(#beamGrad)" filter="url(#shadow)" />
      
      
      <circle cx="95" cy="109" r="4" fill="#475569" />
      <circle cx="365" cy="109" r="4" fill="#475569" />

      
      <g id="leftGroup" class="interactive-group" onclick="highlight('left')">
        
        <line x1="95" y1="109" x2="55" y2="175" stroke="#94a3b8" stroke-width="2" stroke-linecap="round" />
        <line x1="95" y1="109" x2="135" y2="175" stroke="#94a3b8" stroke-width="2" stroke-linecap="round" />
        
        
        <path d="M 45 175 Q 95 188 145 175 L 140 181 Q 95 194 50 181 Z" fill="#64748b" />
        <ellipse cx="95" cy="176" rx="46" ry="6" fill="#94a3b8" />

        
        
        <g class="glow-target" transform="translate(60, 122)">
          
          <rect x="0" y="10" width="38" height="42" rx="6" fill="url(#boxGrad)" filter="url(#shadow)" />
          
          <rect x="15" y="10" width="8" height="42" fill="#93c5fd" opacity="0.85" />
          
          <rect x="0" y="27" width="38" height="7" fill="#93c5fd" opacity="0.85" />
          
          <rect x="-2" y="6" width="42" height="8" rx="3" fill="#60a5fa" />
          
          <text x="19" y="38" font-size="20" font-style="italic" font-weight="800" fill="#ffffff" text-anchor="middle" font-family="system-ui">m</text>
        </g>

        
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    <div class="equation-bar">
      <div id="termLeft" class="term term-left">m − 6</div>
      <div id="termEq" class="term-eq">=</div>
      <div id="termRight" class="term term-right">9</div>
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<html lang="en">
<head>
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  <meta name="aspect-ratio" content="4:3">
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  <div class="diagram-wrap">
    
    <div class="tape-container">
      
      <div class="bar-row">
        <div class="block total-block" data-target="11">
          Total: 11 miles
        </div>
      </div>

      
      <div class="bar-row">
        <div class="block part-m" data-target="m">
          Monday (m)
        </div>
        <div class="block part-4" data-target="4">
          Tuesday (4)
        </div>
      </div>
    </div>

    
    <div class="arrow-container">
      ↓
    </div>

    
    <div class="equation-card">
      <span class="term term-m" data-target="m">m</span>
      <span class="op">+</span>
      <span class="term term-4" data-target="4">4</span>
      <span class="op">=</span>
      <span class="term term-11" data-target="11">11</span>
    </div>

    <div class="hint">Part + Part = Whole</div>
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111.26(b)(9)(A)

Aligned learning resources

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