This simple, hands-on activity has students count out a given number of unit cubes and then asks them to build a square from the cubes. Then, they record the length of the square. Students repeat this process with different numbers of cubes and record the information in a graph and a table. They also are asked to write a rule to describe the relationship between the number of cubes and the length of the square.
I've found that this activity helps students better understand the idea of the square root, and gives an opportunity to talk about perfect square numbers.
This is my first posting and I would appreciate your feedback. Thanks!