Bouncing ball
While doing the bouncing ball assignment, it is important to feel how the ball squash and stretch, how it loses energy while bouncing, how the ball speed up while it moves down and slows down while it moves up.
What I need to improve is to mind the rotation of the ball, and how it slows down after losing all the speed. Also the ball should be at its top speed when it hits the ground, it may seem fine in a 2d animation, but it is still not reasonable that the ball slows down when it hits the ground. So I need to pay more attention to the physical laws while making animation in the future.
Below is the plan and the final 3d animation I made.

Golden poses
Golden poses is the key of making a vivid character animation.
Below are the three golden poses I made.
The hero poses
I mostly refer to a sketch and the spiderman landing poses. The pose has many problems. The biggest problem is the hip, and the balance also needs some improvements.
The standing pose and the happy pose
These two poses have less problems, but there are still a few details i need to pay attention to, like the arc of the body can be more fluent, and some movement maybe a little too exaggerated.