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Override for the tutor's lesson content generation calls. Auto uses the system default (Claude Sonnet 5 for lesson text, Opus 5 for diagrams).

Lesson generation model

System default

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Tutoring abilities

Imagine being a detective, but the clue isn't hidden under a rug—it is sitting right on the page in plain sight.

When you read an informational text, an **explicit detail** is a fact that the author states directly using exact words.

<!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>Finding Exact Details</title>
<style>
  * { box-sizing: border-box; margin: 0; padding: 0; }
  body {
    font-family: -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;
  }

  .main-wrap {
    width: 100%;
    max-width: 480px;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  /* Question Tabs */
  .tab-bar {
    display: flex;
    gap: 8px;
    background: #eef2f6;
    padding: 4px;
    border-radius: 12px;
  }

  .tab-btn {
    flex: 1;
    border: none;
    background: transparent;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    color: #6b7280;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
  }

  .tab-btn.active {
    background: #ffffff;
    color: #0284c7;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  }

  /* Text Display Card */
  .passage-card {
    background: #ffffff;
    border-radius: 14px;
    padding: 24px 20px;
    box-shadow: 0 4px 16px rgba(30, 41, 69, 0.06);
    border: 1px solid #e2e8f0;
    font-size: 19px;
    line-height: 1.6;
    color: #334155;
    position: relative;
  }

  .match-target {
    padding: 2px 6px;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-weight: 500;
  }

  .match-target.highlight {
    background: #fef08a;
    color: #854d0e;
    font-weight: 700;
    box-shadow: 0 0 0 3px rgba(250, 204, 21, 0.35);
  }

  /* Match Callout Tag */
  .status-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #166534;
    padding: 10px 16px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.2px;
    transition: opacity 0.2s ease;
  }

  .icon-check {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: #22c55e;
    color: #ffffff;
    border-radius: 50%;
    font-size: 12px;
  }
</style>
</head>
<body>

<div class="main-wrap">
  
  <div class="tab-bar">
    <button class="tab-btn active" id="tab0" onclick="showMatch(0)">
      <span>❓ Where?</span>
    </button>
    <button class="tab-btn" id="tab1" onclick="showMatch(1)">
      <span>❓ Why?</span>
    </button>
  </div>

  
  <div class="passage-card">
    🦦 Sea otters sleep <span id="target0" class="match-target highlight">wrapped in giant kelp</span> so <span id="target1" class="match-target">currents do not drift them away</span>.
  </div>

  
  <div class="status-badge">
    <span class="icon-check">✓</span>
    <span id="badge-text">Direct match: "wrapped in giant kelp"</span>
  </div>
</div>

<script>
  const matches = [
    { targetId: 'target0', label: 'Direct match: "wrapped in giant kelp"' },
    { targetId: 'target1', label: 'Direct match: "currents do not drift..."' }
  ];

  function showMatch(index) {
    document.querySelectorAll('.tab-btn').forEach((btn, i) => {
      btn.classList.toggle('active', i === index);
    });

    document.querySelectorAll('.match-target').forEach((el) => {
      el.classList.remove('highlight');
    });

    const activeItem = matches[index];
    document.getElementById(activeItem.targetId).classList.add('highlight');
    document.getElementById('badge-text').textContent = activeItem.label;
  }
</script>

</body>
</html>

You do not have to guess or solve a puzzle to find an explicit detail; you just need to spot the right words.

So how do you hunt down the exact sentence you need without reading the entire page five times?

**Step 1:** Identify question **keywords**, such as question words (*who, what, where, when, why*), specific names, or numbers.

**Step 2:** **Scan** the informational text by moving your eyes quickly across the lines to spot those keywords or their synonyms.

**Step 3:** Read the **entire sentence** containing the keyword to confirm it directly answers the question.

<!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 {
    background: #f8f9fa;
    color: #1e2945;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100%;
    padding: 12px;
  }
  .app-container {
    width: 100%;
    max-width: 520px;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .nav-bar {
    display: flex;
    gap: 8px;
    background: #ffffff;
    padding: 6px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  }
  .step-btn {
    flex: 1;
    border: none;
    background: transparent;
    padding: 8px 4px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    color: #6b7280;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
  }
  .step-btn.active {
    background: #22b7ff;
    color: #ffffff;
    box-shadow: 0 2px 6px rgba(34, 183, 255, 0.35);
  }
  .card-view {
    background: #ffffff;
    border-radius: 14px;
    padding: 18px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    gap: 14px;
  }
  .section-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #94a3b8;
    margin-bottom: 4px;
  }
  .box {
    padding: 12px 14px;
    border-radius: 10px;
    background: #f8fafc;
    border: 1.5px solid #e2e8f0;
    font-size: 15px;
    line-height: 1.5;
    color: #334155;
    transition: all 0.3s ease;
  }
  .question-box {
    border-left: 4px solid #64748b;
  }
  .state-1 .question-box {
    border-left-color: #22b7ff;
    background: #f0f9ff;
  }
  .passage-box {
    display: flex;
    flex-direction: column;
    gap: 6px;
    line-height: 1.6;
  }
  .sent {
    padding: 3px 6px;
    border-radius: 6px;
    transition: all 0.3s ease;
  }
  .hl-kw {
    padding: 2px 4px;
    border-radius: 4px;
    font-weight: 600;
    transition: all 0.3s ease;
  }
  .state-1 .q-kw {
    background: #22b7ff;
    color: #ffffff;
  }
  .state-2 .p-kw {
    background: #fef08a;
    color: #854d0e;
    box-shadow: 0 0 0 2px #facc15;
  }
  .state-3 .target-sent {
    background: #ecfdf5;
    box-shadow: 0 0 0 1.5px #10b981;
    color: #065f46;
  }
  .state-3 .p-kw {
    background: rgba(16, 185, 129, 0.2);
    color: #065f46;
  }
  .state-3 .ans-detail {
    background: #10b981;
    color: #ffffff;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
  }
  .indicator-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 4px;
    border-top: 1px solid #f1f5f9;
  }
  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: #1e2945;
  }
  .badge-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #22b7ff;
    color: #fff;
    font-size: 11px;
  }
  .play-toggle {
    background: #f1f5f9;
    border: none;
    border-radius: 20px;
    padding: 5px 12px;
    font-size: 12px;
    font-weight: 600;
    color: #475569;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
  }
</style>
</head>
<body>

<div class="app-container state-1" id="root">
  <div class="nav-bar">
    <button class="step-btn active" onclick="setStep(1)"><span>1</span> Keyword</button>
    <button class="step-btn" onclick="setStep(2)"><span>2</span> Scan</button>
    <button class="step-btn" onclick="setStep(3)"><span>3</span> Full Sentence</button>
  </div>

  <div class="card-view">
    <div>
      <div class="section-label">Question</div>
      <div class="box question-box">
        Where do penguins <span class="hl-kw q-kw">lay eggs</span>?
      </div>
    </div>

    <div>
      <div class="section-label">Passage</div>
      <div class="box passage-box">
        <div class="sent">Penguins live on ice shelves.</div>
        <div class="sent target-sent">
          Females <span class="hl-kw p-kw">lay eggs</span> on <span class="ans-detail">bare ice</span>.
        </div>
        <div class="sent">Fathers keep them warm.</div>
      </div>
    </div>

    <div class="indicator-bar">
      <div class="badge">
        <span class="badge-icon" id="badge-num">1</span>
        <span id="badge-text">Find keyword in question</span>
      </div>
      <button class="play-toggle" id="play-btn" onclick="togglePlay()">⏸ Auto</button>
    </div>
  </div>
</div>

<script>
  let currentStep = 1;
  let isPlaying = true;
  let timer = null;

  const info = {
    1: { icon: "1", text: "Find keyword in question" },
    2: { icon: "2", text: "Scan text for matching word" },
    3: { icon: "✓", text: "Read full sentence for answer" }
  };

  function setStep(step) {
    currentStep = step;
    const root = document.getElementById('root');
    root.className = 'app-container state-' + step;

    const btns = document.querySelectorAll('.step-btn');
    btns.forEach((btn, idx) => {
      btn.classList.toggle('active', idx + 1 === step);
    });

    document.getElementById('badge-num').textContent = info[step].icon;
    document.getElementById('badge-text').textContent = info[step].text;
  }

  function nextStep() {
    let next = currentStep + 1;
    if (next > 3) next = 1;
    setStep(next);
  }

  function startAuto() {
    stopAuto();
    timer = setInterval(nextStep, 3200);
  }

  function stopAuto() {
    if (timer) clearInterval(timer);
  }

  function togglePlay() {
    isPlaying = !isPlaying;
    const btn = document.getElementById('play-btn');
    if (isPlaying) {
      btn.textContent = "⏸ Auto";
      startAuto();
    } else {
      btn.textContent = "▶ Play";
      stopAuto();
    }
  }

  startAuto();
</script>

</body>
</html>

Let's put the **3-Step Retrieval Strategy** into action with a real science passage.

**Passage:** Lanternfish live in the dark depths of the ocean. They have tiny organs called photophores along their bellies that produce blue and green light. This glowing light helps lanternfish confuse predators swimming below them.

**Question:** What colors of light do the organs on a lanternfish produce?

<!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>Finding Exact Details</title>
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #f8f9fa;
      color: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
    }

    .main-layout {
      width: 100%;
      max-width: 540px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    /* Step Nav */
    .nav-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 8px;
    }

    .step-tabs {
      display: flex;
      gap: 6px;
      flex: 1;
    }

    .step-btn {
      flex: 1;
      padding: 6px 4px;
      font-size: 13px;
      font-weight: 600;
      border: 1px solid #e2e8f0;
      background: #ffffff;
      border-radius: 8px;
      color: #64748b;
      cursor: pointer;
      text-align: center;
      transition: all 0.25s ease;
    }

    .step-btn.active {
      background: #22b7ff;
      color: #ffffff;
      border-color: #22b7ff;
      box-shadow: 0 2px 6px rgba(34, 183, 255, 0.3);
    }

    .play-btn {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      border: 1px solid #e2e8f0;
      background: #ffffff;
      color: #1e2945;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 13px;
    }

    /* Cards */
    .card-box {
      background: #ffffff;
      border-radius: 12px;
      padding: 12px 14px;
      border: 1px solid #e6e8eb;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
      position: relative;
    }

    .badge-label {
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: #8b95a5;
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .content-text {
      font-size: 15px;
      line-height: 1.5;
      color: #334155;
    }

    /* Highlighting States */
    .kw {
      padding: 1px 4px;
      border-radius: 4px;
      transition: all 0.3s ease;
    }

    /* Step 0: Clues */
    .step-0 .q-clue {
      background: #fef08a;
      color: #854d0e;
      font-weight: 600;
    }

    /* Step 1: Scan & Find */
    .step-1 .q-clue,
    .step-1 .t-scan {
      background: #e0f2fe;
      color: #0369a1;
      font-weight: 600;
    }

    /* Step 2: Exact Match */
    .step-2 .t-match {
      background: #bbf7d0;
      color: #15803d;
      font-weight: 700;
      box-shadow: 0 0 0 2px #22c55e;
    }

    .match-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: #f0fdf4;
      border: 1px solid #bbf7d0;
      border-radius: 10px;
      padding: 8px 12px;
      opacity: 0;
      transform: translateY(4px);
      transition: all 0.3s ease;
      min-height: 42px;
    }

    .step-2 .match-banner {
      opacity: 1;
      transform: translateY(0);
    }

    .match-badge {
      font-size: 12px;
      font-weight: 700;
      color: #166534;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .light-tags {
      display: flex;
      gap: 6px;
    }

    .tag {
      font-size: 12px;
      font-weight: 600;
      padding: 2px 8px;
      border-radius: 12px;
    }

    .tag-blue { background: #38bdf8; color: #082f49; }
    .tag-green { background: #4ade80; color: #052e16; }

    /* Visual Indicator Arrow */
    .arrow-flow {
      display: flex;
      justify-content: center;
      align-items: center;
      color: #94a3b8;
      font-size: 13px;
      gap: 6px;
      font-weight: 600;
    }
  </style>
</head>
<body>

<div class="main-layout" id="diagramRoot">
  
  <div class="nav-bar">
    <div class="step-tabs">
      <button class="step-btn active" id="tab0">1. Question Clues</button>
      <button class="step-btn" id="tab1">2. Scan Text</button>
      <button class="step-btn" id="tab2">3. Exact Answer</button>
    </div>
    <button class="play-btn" id="playBtn" title="Play/Pause">⏸</button>
  </div>

  
  <div class="card-box">
    <div class="badge-label">❓ Question</div>
    <div class="content-text">
      What <span class="kw q-clue">colors of light</span> do the <span class="kw q-clue">organs</span> on a lanternfish produce?
    </div>
  </div>

  
  <div class="arrow-flow">
    <span>↓</span> Scan text for clues <span>↓</span>
  </div>

  
  <div class="card-box">
    <div class="badge-label">📄 Informational Text</div>
    <div class="content-text">
      Lanternfish live in the deep sea. Special <span class="kw t-scan">organs</span> along their belly produce <span class="kw t-match">blue and green light</span> to blend in with ocean water.
    </div>
  </div>

  
  <div class="match-banner">
    <div class="match-badge">
      <span>✓</span> Exact Detail Found:
    </div>
    <div class="light-tags">
      <span class="tag tag-blue">blue light</span>
      <span class="tag tag-green">green light</span>
    </div>
  </div>
</div>

<script src="{{VENDOR_CDN}}/classace-diagram.js"></script>
<script>
  (function() {
    const root = document.getElementById('diagramRoot');
    const tabs = [
      document.getElementById('tab0'),
      document.getElementById('tab1'),
      document.getElementById('tab2')
    ];
    const playBtn = document.getElementById('playBtn');

    let currentStep = 0;
    let isPlaying = true;
    let timer = null;

    function renderStep(idx) {
      currentStep = idx;
      root.className = 'main-layout step-' + idx;
      tabs.forEach((tab, i) => {
        if (i === idx) {
          tab.classList.add('active');
        } else {
          tab.classList.remove('active');
        }
      });
    }

    function nextStep() {
      renderStep((currentStep + 1) % 3);
    }

    function startTimer() {
      stopTimer();
      timer = setInterval(nextStep, 3500);
      isPlaying = true;
      playBtn.textContent = '⏸';
    }

    function stopTimer() {
      if (timer) {
        clearInterval(timer);
        timer = null;
      }
      isPlaying = false;
      playBtn.textContent = '▶';
    }

    // Tab clicks
    tabs.forEach((tab, i) => {
      tab.addEventListener('click', () => {
        stopTimer();
        renderStep(i);
      });
    });

    // Play/Pause toggle
    playBtn.addEventListener('click', () => {
      if (isPlaying) {
        stopTimer();
      } else {
        nextStep();
        startTimer();
      }
    });

    // Initialize
    renderStep(0);
    startTimer();
  })();
</script>

</body>
</html>

The text directly states the answer: the organs produce **blue and green light**.

A common mistake is guessing from your imagination—like answering 'yellow light' because lanterns in your house are yellow.

Always make sure the fact is written right in the sentences before you lock in your answer.

Whenever you tackle an informational text question, remember: underline the keywords, scan the lines, and let the author's exact words prove your answer.

Finding Exact Details in an Informational Text. Locate specific details in an informational text that directly answer questions about the topic.

Referring to Details in an Informational Text (4th Grade Reading & Vocab)

Grade 4: Identify Supporting Details in Informational Texts

Retrieving Information from Non-Fiction Texts: Skimming and Scanning

Teaching RI.4.1 mastery requires clear separation between explicit retrieval and inferencing. Fourth-grade students benefit greatly from the 'Scan, Frame, and Point' routine: students identify the question's question-word/target nouns, scan to frame the corresponding sentence in the text, and physically point to or highlight the exact words that answer the question before writing their response.

Finding Exact Details in an Informational Text

The 3-Step Retrieval Strategy

Worked Example: The Lanternfish