In science, we are learning about flippers. ( It shoots mass that is placed on the platform)
We are measuring the distance and height the mass( alminium foil balls) flies, and change one variable, to make a controled experiment. We had some ( To tell you, A Lot) arguments in the way we do the experiment, but we solved the situation and finished the job.
So far, this is the best unit I have done in science. You could try it with other canupults, and get different results. Try it yourself.