Khan Academy
Khan Academy: Animation 101 (Practice)
This is a 7-problem quiz/practice bouncing a ball using the squash and stretch with Bezier curves.
Khan Academy
Khan Academy: Squash and Stretch Animation With Bezier Curves
In this practice exercise students use the program below to create an animation of a bouncing ball. See if you can get the ball to squash as it hits the ground and stretch as it bounces back.