Teacher Guide
Week 24
Area & Perimeter — Teacher Guide
Monday: Perimeter
1
Warm-up
1.
Rectangle has 4 sides
2
Ant Walk
1.
2×2 square: 8 units
3
Find Perimeter
1.
2×4: 12 | 3×3: 12 | 1×5: 12 | 3×2: 10
4
Number Talk
1.
Nia's adding-sides way is faster; opposite sides are equal
2.
Same! 5+1+5+1=12 and 3+3+3+3=12
5
Challenge
1.
Both strategies give 10 units for 3×2
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Tuesday: Area
1
Warm-up
1.
12 units, 14 units
2
Learn
1.
3×3: 9 square units
3
Estimate First
1.
2×5=10, 4×3=12, 3×4=12, 2×2=4 — praise close estimates
4
Two Ways
1.
Both give 12; skip counting rows (4, 8, 12) is usually faster
5
Word Problems
1.
12 tiles
2.
Same! 2×6=12 and 3×4=12 — great discussion moment
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Wednesday: Both Together
1
Warm-up
1.
perimeter, area, perimeter, area
2
Find Both
1.
2×3: A=6 P=10 | 3×4: A=12 P=14 | 2×5: A=10 P=14 | 3×3: A=9 P=12
3
L-Shape
1.
Area = 8 square units, Perimeter = 14 units (trace carefully!)
4
Find the Error
1.
✗ — Jayden only added 2 sides. Correct: 4+2+4+2 = 12 units
5
Create Own
1.
Any shape covering exactly 10 squares; perimeters vary (e.g., 2×5 → 14; L-shapes differ). Bonus: yes
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Thursday: Measuring & Real World
1
Warm-up
1.
20, 40, 16
2
Ruler
1.
A: 1 in, B: 2 in, C: 1.5 in (accept 1 or 2), D: 2.5 in (accept 2 or 3) — nearest inch
3
Paper Clips
1.
Answers vary; discuss how the first measurement helps calibrate later estimates
4
Word Problems
1.
Perimeter: 6+4+6+4 = 20 meters
2.
Area: 5×4 = 20 notes
3.
Perimeter: 7+5+7+5 = 24 units
5
Number Talk
1.
Yes! Same fence, different area (e.g., 5×1 vs 3×3)
2.
Both are right — different units give different numbers for the same length
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Friday: Review & Self-Check
1
Warm-up
1.
perimeter, area, square
2
Estimate First
1.
3×5=15, 2×4=8
3
Review
1.
2×6: A=12 P=16 | 4×4: A=16 P=16 | 3×5: A=15 P=16
4
Word Problems
1.
15 square units
2.
16 units
5
Self-Check
1.
Accept student self-assessment and reflection