Teacher Guide
Week 14
Problem Solving Strategies — Teacher Guide
Monday: Draw a Picture
1
Warm-up ±100
1.
400, 400, 300, 700
2
Strategy
1.
24-12=12 green, 45-28=17 empty
3
Practice
1.
56-23=33 tulips, 72-38=34 not 2nd grade
4
Two-Step
1.
32+28=60, 84-60=24 cans Wednesday
5
Number Talk
1.
B easier to draw (concrete objects)
Page break
Tuesday: Work Backward
1
Warm-up
1.
300, 350, 500, 250
2
Strategy
1.
52-18=34 marbles, 67-25=42 pages
3
Practice
1.
48-14=34 stickers, 35-12=23 birds, 56-23=33 dollars
4
Challenge
1.
33+19=52, 52+28=80 cupcakes
5
Unknown
1.
78-35=43 | 95-42=53
Page break
Wednesday: Look for a Pattern
1
Warm-up
1.
50, 500, 45, 20
2
Strategy
1.
+12 rule: 60,72,84 | Plant: 10,12,14,16,18,20
3
Find Rule
1.
+15: 75,90 | -20: 120,100
4
Pattern
1.
3,6,9,12,15,18,21 → $21 on Day 7
5
Create Own
1.
Accept student-created patterns
Page break
Thursday: Guess and Check
1
Warm-up
1.
600, 420, 45, 94
2
Strategy
1.
45-28=17 | 85-30=55
3
Practice
1.
63-38=25 | 91-45=46 | 72-29=43
4
Choose Strategy
1.
Draw/Work Backward: 68-35=33 | Work Backward: 64-27=37
2.
Two Ways: 53-26=27 outside (any two valid strategies, same answer)
5
Challenge
1.
32 and 68 (32+68=100, 68−32=36 ✓)
Page break
Friday: Review All Strategies
1
Warm-up
1.
500, 600, 300, 800
2
Pick Strategy
1.
85-42=43 chairs | 34+15=49 pencils | 3×6=18 inches
3
Mixed Review
1.
150-67=83
4
Big Challenge
1.
Estimate: ≈350−(90+120+60)=80; Actual: 87+124+63=274 used, 348-274=74 left
5
Self-Check
1.
Accept student self-assessment and reflection