Students will need various items, a balance scale, a large set of cubes such as unifix or snap cubes, and a recording sheet. They choose an item to measure. Using the balance scale, they put the item on one side of the balance scale. Then they put enough cubes on the other side of the scale to make it balance. They remove the cubes, count them, and record the result. For example, if a small book balances with 12 cubes, they should write, "The book has the same mass as 12 cubes." They continue same routine three more times with different items.
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