This lesson starts with an introduction to the 12 principles of animation.

12 PRINCIPLES OF ANIMATION: https://informatics.wu.ac.th/wp-content/uploads/12.gif

Then the teacher showed us a lot of reference videos and told us that what we should refer to most is the real experiment rather than the animation made by others.

Then the teacher commented on the little ball-bouncing homework I had done after the last class. My homework is mainly the spacing problem when the ball bounces, and the rotation problem. Do not rotate the y and z axes when doing the ball bounce.

My 2D freehand sketching referenece:

Pendulum Rig Homework: https://www.syncsketch.com/sketch/MGY3NTg4YTU4/

After the teacher gave suggestions for modification, I went home to make modifications and integrated the process.