Liam:

Looks good, I think a bit more expression in the faces could liven this up a lot.

Timothy Muller:

Hello there. I have a few recommendations that I think will help you:
1. You have some stiff posing, such as the student's reaction to the light turning on and the teacher in most of shot 2. Your transitions are ok with the stretching, but a minor anticipation before stepping off to the side would've helped.
2. Your facial expressions and lip sync are a bit off. Try playing around with their eyebrows more; don't be afraid to tighten the timing and push their forms. Your lip sync is sometimes off, but the audio clip itself may simply have been displaced be a frame or two. Nevertheless, follow the same advice I gave for the brows.
Overall, I enjoyed watching this. Keep up the good work.