Goal: compare 0.4 and 0.37, then 1.05 and 1.5 by equal wholes and place value. Materials: two same-sized grids per pair, robot-screen card, number line.
- Notice, 3: Ask “Which is greater, 0.4 or 0.37?” Gather predictions without scoring before models.
- Model, 5: Rewrite 0.4 as 0.40. Shade 40/100 and 37/100 on same-sized grids. “Forty hundredths is three hundredths more than thirty-seven; 0.4 is greater.” Explain zero records zero hundredths beyond four tenths.
- Together, 8: Build 1.05 (one whole+five single cells) and 1.5 (one whole+five full rows). Compare: 1.50>1.05 by 45/100. Use robot-screen card for 1.05; children audit a teacher error “1.05 is more because 05 looks like 5.”
- Try, 6: Learner orders 0.09, 0.9, 0.39 and gives a model or place-value reason. Key: 0.09<0.39<0.9 (=0.90). Adult may read numerals aloud, but child chooses order.
- Check, 3: “Which is greater, 0.6 or 0.59? By how much?” Key: 0.60>0.59 by 0.01. If digits are compared as whole-number strings, use 60/100 versus 59/100.