Thanks. I didn't know that!
Motion sensors usually feed a string of numbers into a spreadsheet indicating velocity or distance. So you can measure the velocity of a coffee filter as it drops, accelerates, and reaches terminal velocity.
My concern from looking at AP sample questions, is that they expect the students to be familiar with this equipment.
But 10 ideas just jumped into my mind knowing that they all possess accelerometers. Can they ride to school on the bus while accumulating data? That would be cool to graph their commute.