Ready, aim, fire! Launch to a new level of understanding as scholars build and test their own catapults. Learners explore lever design and how adjusting the fulcrum changes the outcome. 

Students study the meaning, symbolism, and value of U.S. coins, especially the quarter. They l research why in 1965 the U.S. Mint decided to change the metal composition of the quarter to copper coated with zinc. In addition, they...