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A New Job for the Kitchen Cubes

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A New Job for the Kitchen Cubes

Use build records to explain how the same small pieces can make a new object.

Read the kitchen model records

Read the records from the school kitchen design team. Use the records to answer the questions.

The Cube Kitchen Test

1The school kitchen needed a holder for a recipe card. Priya and Mateo built a model stand from eight identical snap cubes. They joined four cubes in a row and joined four more cubes above that row. They counted the cubes and took a picture before taking the stand apart.

2Next, the team gently pulled the cubes apart and put them in a tray. They did not cut, bend, paint, or replace any cube. Then they built a napkin caddy. The caddy had four short posts. Each post was made from two joined cubes. The middle of the caddy was open.

3The team made a new record. The recipe-card stand had eight cubes in a wide, flat shape. The napkin caddy had eight cubes in four posts and an open middle. Both models stood on the counter. The team wrote that the cubes were the same size and color in both models.

1.

How many cubes were in the recipe-card stand? cubes

2.
What is one way the napkin caddy differed from the recipe-card stand?
Question 2 options
3.
Select the TWO observations that support the idea that the team reused the original cubes.

4.
Match each record detail to what it helps show.

Judge the new builds

Use the records to judge each plan. Remember that a complete reuse uses all eight original cubes and no added cubes.

5.
Sort each plan.
6.

The napkin caddy has four posts with two cubes in each post. How many cubes are in the caddy? cubes

7.
A student says, “The caddy has taller parts, so it must have more cubes.” Which answer uses the records?
Question 7 options
8.
Which check would give the strongest evidence that the caddy uses the stand's pieces?
Question 8 options
9.
Sort each detail about changing the stand into the best group.
10.
The team wants the recipe-card stand and the napkin caddy on the counter at the same time. What do they need?
Question 10 options
11.
Why does the picture of the finished caddy by itself give limited evidence about the cubes?
Question 11 options
12.
Make a claim: Could the same eight cubes make both the recipe-card stand and the napkin caddy? Use TWO details from the records as evidence.
13.
The team wants to turn the napkin caddy into one long row of eight cubes. Explain the steps they should take. Tell what would change and what would stay the same.