Cogito
Pre-K Math · Chapter 3 · Lesson 3
Rectangles
Like a square, but stretched.
10 problems · about 6 minutes · PK.G.1
What this lesson teaches
The child names rectangles and tells them apart from squares.
- A rectangle has four sides.
- Two are long and two are short.
- Doors and books are rectangles.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
5 problemsReview — 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.
Review — Counting a Jumble: How many? ●●●●●●●●
Answer 8
Why Eight.
Review — Zero Means None: Nothing on the table. How many?
Answer 0
Why Zero.
Review — One More: One more than 7?
Answer 8
Why Eight.
Warm Up
Straightforward practice. Get the method working first.
2 problemsHow many sides does a rectangle have?
Answer 4
Why Four.
How many corners does a rectangle have?
Answer 4
Why Four.
Build It Up
The same ideas with more to keep track of.
1 problemIs a door a rectangle?
Answer Yes.
Why Long and short sides.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
2 problemsHow many long sides does a rectangle have?
Answer 2
Why Two long, two short.
The Book: How many sides does a rectangle have?
Answer 4
Why Four.