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<div class="tg-head"><span class="week">Teacher Guide</span><span class="day">Week 15</span><span class="topic">Length: Inches & Centimeters — Teacher Guide</span></div>
<div class="tg-section-title">Monday: Measuring in Inches</div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">1</span><span class="tg-sec-t">Warm-up: Choose Tool</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">pencil: ruler, door: measuring tape, book: ruler, waist: measuring tape</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">2</span><span class="tg-sec-t">How to Use a Ruler</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">Demonstration — line up at 0, read the end mark</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">3</span><span class="tg-sec-t">Estimate First</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">A=3 in, B=5 in, C=2 in (accept any reasonable estimate)</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">4</span><span class="tg-sec-t">Measure in Inches</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">1) 4 in, 2) 1 in, 3) 6 in, 4) 3 in</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">5</span><span class="tg-sec-t">Word Problem</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">2 inches longer (6−4=2)</span></div>
</div></div><p class="tg-note">Page break</p>
</page><page>
<div class="tg-section-title">Tuesday: Measuring in Centimeters</div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">1</span><span class="tg-sec-t">Warm-up: Inches Review</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">A=2 in, B=5 in</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">2</span><span class="tg-sec-t">Meet the Centimeter</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">Discussion — cm is smaller than inch</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">3</span><span class="tg-sec-t">Estimate First</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">A=8 cm, B=12 cm, C=5 cm (accept reasonable estimates)</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">4</span><span class="tg-sec-t">Measure in cm</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">1) 10 cm, 2) 4 cm, 3) 14 cm, 4) 7 cm</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">5</span><span class="tg-sec-t">Word Problem</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">14 cm (5+9)</span></div>
</div></div><p class="tg-note">Page break</p>
</page><page>
<div class="tg-section-title">Wednesday: Inches vs. Centimeters</div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">1</span><span class="tg-sec-t">Warm-up</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">1 inch is longer; centimeters gives the bigger number (smaller unit → more of them)</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">2</span><span class="tg-sec-t">Measure Two Ways</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">Line A: 2 in ≈ 5 cm; Line B: 4 in ≈ 10 cm</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">3</span><span class="tg-sec-t">Number Talk</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">Centimeters — the unit is smaller, so you need more of them to cover the same length</span></div>
<div class="tg-problem">2. <span class="ans">Sam forgot the UNIT — '3' could be 3 inches, 3 cm, or 3 feet</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">4</span><span class="tg-sec-t">Best Unit</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">ant: cm/inches (small), bed: feet/meters (big), paper clip: cm/inches (small), door: feet/meters (big)</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">5</span><span class="tg-sec-t">Estimate Real Objects</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">Accept reasonable estimates; typical: pencil ≈ 7 in, hand span ≈ 15 cm, spoon ≈ 6 in, shoe ≈ 20 cm</span></div>
</div></div><p class="tg-note">Page break</p>
</page><page>
<div class="tg-section-title">Thursday: Comparing Lengths</div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">1</span><span class="tg-sec-t">Warm-up</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">A=6 cm, B=11 cm</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">2</span><span class="tg-sec-t">How Much Longer</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">Pair 1: 9 and 4, 5 cm longer | Pair 2: 13 and 6, 7 cm longer | Pair 3: 10 and 7, 3 cm longer</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">3</span><span class="tg-sec-t">Word Problems</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">6 inches longer (14−8)</span></div>
<div class="tg-problem">2. <span class="ans">40 cm (25+15)</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">4</span><span class="tg-sec-t">Order by Length</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">A=5 in, B=2 in, C=4 in; order: B, C, A</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">5</span><span class="tg-sec-t">Create Own</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">Accept student drawings ≈3 in and ≈5 in with a valid comparing question</span></div>
</div></div><p class="tg-note">Page break</p>
</page><page>
<div class="tg-section-title">Friday: Review & Self-Check</div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">1</span><span class="tg-sec-t">Warm-up</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">1 inch is LONGER than 1 cm; ant → centimeters (or inches)</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">2</span><span class="tg-sec-t">Estimate First</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">A=4 inches, B=9 cm (accept reasonable estimates)</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">3</span><span class="tg-sec-t">Measuring Review</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">1) 3 in, 2) 12 cm, 3) 5 in, 4) 8 cm</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">4</span><span class="tg-sec-t">Word Problems</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">9 cm (15−6)</span></div>
<div class="tg-problem">2. <span class="ans">19 inches (12+7)</span></div>
</div></div><div class="tg-sec"><div class="tg-sec-head"><span class="tg-sec-n">5</span><span class="tg-sec-t">Self-Check</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">Accept student self-assessment and reflection</span></div>
</div></div>
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