While I was gone to the conference this past weekend , Allan and Dane built an "OGRE" catapult. (Well, their own version of one.) We have been trying all kinds of different experiences where Dane can either "blow things up" or send thing flying in the air. ( Here is a link to one of our catapult projects ) This evening, we opted to try some predicting with the latest model of a catapult. First, we tried to decide how far we thought the sponge bombs would fly. We wrote our predictions down. Then, it was time to.... Ready, Aim... Fire! After we shot all of the bombs, we used a measuring tape to determine how accurate our predictions were. We wrote down the actual distances and then compared them to the original guesses. Who was the closest? How much more/less did you guess? If you have to guess again, what would you say? Did the bombs all go the same distance? Why do you think that is? Do you think you can make the bombs land in the dump truck? Where ...