During this engaging activity, your students will use their estimation skills to find items that have a mass of one kilogram.

After identifying an item that has a mass of exactly one kilogram, your students will use it as a guide to find other items in the classroom that have a similar mass. They will do this by holding the items and comparing them. When they have decided on their items, they will then use scales to find their accurate mass and see how close their estimations were.

Two versions of the worksheet are available to help with differentiation. The first version has fewer items to find and larger spaces to record data. This will allow students to draw the items rather than write their names if needed.