Cogito
Pre-K Math · Chapter 4 · Lesson 2
Sorting by Shape and Size
More ways to make groups.
10 problems · about 6 minutes · PK.MD.2
What this lesson teaches
The child sorts objects by attributes other than colour.
- You can sort by colour, shape, or size.
- The same things can be sorted many ways.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
5 problemsReview — Sorting by Colour: 🔵🔵🔵🔴. How many blue?
Answer 3
Why Three.
Review — Shape Hunt: A plate is what shape?
Answer A circle.
Why A circle.
Review — Rectangles: How many sides does a rectangle have?
Answer 4
Why Four.
Review — Triangles: How many corners does a triangle have?
Answer 3
Why Three.
Review — Circles and Squares: How many corners does a square have?
Answer 4
Why Four.
Warm Up
Straightforward practice. Get the method working first.
2 problemsFive small cars and one big. How many small?
Answer 5
Why Five.
Can you sort by shape?
Answer Yes.
Why Circles and squares.
Build It Up
The same ideas with more to keep track of.
1 problemThree big and two small. How many big?
Answer 3
Why Count the big.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
2 problemsHow many sides does a hexagon have?
Answer 6
Why Count around.
Big and Small: Two big balls and four small. How many small?
Answer 4
Why Four.