Grade 3

Read the Headline Story to the students.

Joshua made a rectangular array using 15 square tiles. Next, he made a model of a one-story building by putting 1 cube on each tile. Then he added more stories to his building by putting more cubes on top of previous layers of cubes. What can you say about Joshua’s model?

- The area of Joshua’s array is 15 square units.
- He could have made a 3-by-5 rectangle or a 1-by-15 rectangle with the square tiles.
- Joshua used 15 cubes for each story of his building.
- The volume of the one-story building was 15 cubic units.
- Two stories have a column of 30 cubic units, and 3 stories have a column of 45 cubic units.
- Joshua created a rectangular prism.

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