Early Math  /  Equipartitioning  /  Week 3: Lesson 9  /  Activity

Pizza Puzzle

 

Equipartitioning
Hands-On

Put the pizza puzzle together, then share the slices equally.

A child arranges four pieces of a paper pizza. Two children divide pieces of paper pizza equally between two paper plates.

Children work together to put the pizza puzzles together.

Children share the pizza slices equally with their partners.

 

Materials


Materials used in Pizza Puzzle.
 
Materials PDF
  • Pizza Puzzle boards and pieces (PDF)
  • Cardstock or plain paper
  • Scissors
  • Envelopes, one for each pair of children

Preparation

  1. Print (on cardstock if possible) the Pizza Puzzle boards and pieces. Cut out the pizza board and the puzzle pieces (pizza slices) along the dotted lines. You will need a set of the 4 pizza puzzle boards and their corresponding pizza puzzle pieces for each pair of children. Laminate, if desired. Place a complete set of pizza boards and puzzle pieces in an envelope for each pair of children.
 

Directions


  1. Show the sets of pizza boards and puzzle pieces as you explain, Four pizzas were divided into equal shares. One was divided into 2 slices, another into 4 slices, another into 8 slices, and the last into 16 slices. The slices are all mixed up, but we have the pizza puzzle board to help us put them back together again, like our other puzzles! You and a partner will have four pizza puzzles and all the pizza slices for each. You must work together to decide which pizza slice goes with which puzzle. Then put the pizza puzzles back together, so that they are whole and each pizza’s slices are all the same size.
  2. Divide the class into pairs. Give each pair the four puzzle boards and the four sets of puzzle pieces. Have them put together the four pizza puzzles, helping as needed. They may spread out on the rug to work, or move to tables if needed.
  3. After the children have completed the task, reinforce the concept of wholes made of equal parts. Say, You made whole pizzas (circles) from equal-sized pizza slices. Ask, How many slices did it take to make each of your pizzas? How did you know which slice went with which pizza?
  4. Now have each pair of children share the pieces from each of their four pizzas equally, so that each partner has the same number of each size slice.

Note: Adjust the level of challenge by offering only the 2- and 4-piece puzzles or only the 8- and 16-piece puzzles. For additional challenge, have the children complete the pizza puzzles without the puzzle boards.


Length of Play

10 min.

Group Size

Whole Class

In the Schedule

Circle Time


 
Vocabulary
  • divide
  • too many
  • too few
  • add
  • subtract
  • equal
  • same
  • more
  • less
  • share
  • number names
 
Learning Goals
  • Divide a collection of objects into equal groups
  • Divide and share a whole object equally
  • Understand what it means to share equally
  • Compare collections of objects, and identify which has more and by how many
  • Compare the pieces in a collection and identify whether they are the same size
  • Learn or reinforce number names
  • Count a collection of objects