Lesson 11 A Bigger Piece

• Let’s compare the size of halves and fourths.

Warm-up Choral Count: 10 More, 10 Less

Count by 10, starting at 6.

What patterns do you see?

Activity 1 Which is Bigger?

• Each partner cuts out their circle.

• Decide who will cut into halves and who will cut into fourths.

• Fold your circle into halves or fourths then cut it.

• What do you notice?

• Be ready to explain your thinking in a way that others will understand.

• What do you notice?

• Be ready to explain your thinking in a way that others will understand.

Activity 2 Priya and Han Share Roti

Priya and Han are sharing roti.

• Priya says, “I want half of the roti because halves are bigger than fourths.”

• Han says, “I want a fourth of the roti because fourths are bigger than halves because 4 is bigger than 2.”

Who do you agree with?

Show your thinking using drawings, numbers or words.

Use the circle if it helps you.

Activity 3 Introduce Geoblocks: Feel and Guess

We are going to learn a new way to play Geoblocks, called Feel and Guess.