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.

    • Compare your pieces with your partner.

    • What do you notice?

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

    Circle.
    • Repeat with your squares.

    • Compare your pieces with your partner.

    • What do you notice?

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

    Square.
  1. Write 2 things you notice about your pieces.

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.”

Flatbread in a circular shape.

Who do you agree with?

Show your thinking using drawings, numbers or words.

Use the circle if it helps you.

Circle.

Activity 3 Introduce Geoblocks: Feel and Guess

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