Students are given an item to estimate. You decide if they will
estimate the weight of the item or the amount of the item.
Example 1: You show the students a jar of gumballs. You have
them estimate the number of gumballs in the jar.
Example 2: You show the students a pumpkin. You have them
estimate the weight of the pumpkin.
Each student records the estimation.
At some point give them the correct amount or weight. They will
also record the correct amount.
Using both the estimate and the correct amount, the students will
calculate the percent change. The use of a calculator is a great
tool to use for this, but they must show the process used.
After calculating the percent change, the percent will be evaluated
and the evaluation is included in the table.
The evaluations are then graphed.
Although this assignment does help with estimating, the ultimate
concept is calculating percent change. With the percents, they are
able to see how well they estimate.