Just what is a penny worth? Learners explore various websites or printed fact sheet investigating the history and changes in density of pre- and post- 1982 pennies. They will also research the current price of copper and zinc and compare the ratios or pre and post 1982 pennies. Students then complete a hands-on lab experiment to determine the mass, volume, and density of pre and post 1982 pennies. Learners determine if the pennies are worth saving?