Teacher Guide
Week 21
2D Shapes & Attributes — Teacher Guide
Monday: Sides, Vertices & Angles
1
Warm-up Sides
1.
triangle 3, square 4, rectangle 4, circle 0
2
New Words
1.
Vocabulary intro — no answers needed
3
Count Attributes
1.
Triangle 3/3, Square 4/4, Rectangle 4/4, Star 10/10, Circle 0/0
4
Number Talk
1.
5 sides — sides always equal vertices in a polygon
2.
No — every side needs a corner to connect to the next
5
Word Problem
1.
3 posts + 3 flowers = 6 in all
Page break
Tuesday: Polygons vs. Non-Polygons
1
Warm-up Vertices
1.
3, 4, 4, 6
2
Estimate First
1.
Shapes have 5, 6, 8, 7 sides — accept close guesses
3
Polygon or Not
1.
yes, no (curved), yes, no (open), yes, no (circle)
4
Two Reasons
1.
Has curves; is not closed (open shape)
5
Word Problem
1.
Wrong — shape must be CLOSED to be a quadrilateral
Page break
Wednesday: Naming Polygons
1
Warm-up Names
1.
3=triangle, 4=quadrilateral, 5=pentagon, 6=hexagon
2
Name That Polygon
1.
pentagon/5, triangle/3, hexagon/6, quadrilateral/4, pentagon/5
3
Sort Two Ways
1.
3-4: triangle, square, rectangle; 5+: pentagon, hexagon. Way 2: accept any consistent rule
4
Word Problems
1.
8−3=5 more sides
2.
5+5+6=16 vertices
5
Riddle
1.
Accept any correct riddle + drawing
Page break
Thursday: Drawing Shapes & Real-World
1
Warm-up Shape Math
1.
6, 8, 8, 9
2
Draw the Shape
1.
Any triangle; any non-square quadrilateral; any pentagon; e.g. circle or oval
3
Real-World
1.
5+6=11 sides
2.
Two triangles, 3 vertices each
4
Number Talk
1.
3 triangles: 9 vertices > 2 quads: 8
2.
Rosa is right — all squares have 4 sides; not all 4-sided shapes are squares
5
Create Own
1.
Accept any picture with required shapes counted
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Friday: Review & Self-Check
1
Warm-up
1.
6, 5, quadrilateral, 3
2
Estimate First
1.
7 sides, 8 sides
3
Review Table
1.
3/3, 4/4, 4/4, 0/0
4
Word Problem
1.
6 gems × 2 = 12 dollars
5
Self-Check
1.
Accept student self-assessment and reflection