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<page>
<div class="tg-head"><span class="week">Teacher Guide</span><span class="day">Week 17</span><span class="topic">Measurement: Length & Comparing — Teacher Guide</span></div>
<div class="tg-section-title">Monday: Measuring with an Inch Ruler</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">12, 8, 15, 7</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">Ruler Basics</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">Emphasize lining up the 0 end; common error is starting at 1</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">Measure in Inches</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">A=2 in, B=4 in, C=3 in, D=5 in</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">Number Talk</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">D is longer — it stretches farther; pencil is about 3 inches longer (7−4)</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">Challenge</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">Any real objects; check ruler technique, not exactness</span></div>
</div></div><p class="tg-note">Page break</p>
</page><page>
<div class="tg-section-title">Tuesday: Estimating & 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</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">16, 7, 15, 8</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">Centimeters</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">Fingertip ≈ 1 cm benchmark</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=5 cm, B=9 cm, C=3 cm, D=7 cm; praise estimates within 2 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">Best Unit</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">ant=cm, door=feet (or meters), shoe=inches, soccer field=meters</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">30−12 = 18 cm</span></div>
</div></div><p class="tg-note">Page break</p>
</page><page>
<div class="tg-section-title">Wednesday: Measuring Twice</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">7, 14, 5, 13</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 Twice</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">A: 2 in / 4 cm; B: 4 in / 8 cm; C: 3 in / 6 cm (printed scale)</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 are smaller units, so it takes MORE of them to cover the same line</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">How Much Longer</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">17 cm, 26 inches, 33 cm, 48 inches</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 Your Own</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">Any line; celebrate estimates within 1 inch of 4</span></div>
</div></div><p class="tg-note">Page break</p>
</page><page>
<div class="tg-section-title">Thursday: Length Word Problems</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">18, 9, 13, 9</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 (Real Objects)</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">Paper width ≈ 8.5 in; other answers vary — check reasonableness</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">63−38 = 25 cm added; 72−45 = 27 inches empty; 34+19 = 53 inches</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">Two Ways</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">50−23 = 27 cm; counting up: 23→30 is 7, 30→50 is 20, total 27</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 problems with correct solution</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">7, 17, 8, 13</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 cm, B=8 cm (printed scale)</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">Mixed Review</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">5 inches taller; meters; 13 cm; 24 inches</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 Problem</span></div><div class="tg-box"><div class="tg-problem">1. <span class="ans">47+29 = 76 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">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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