<- This is not how you do it!
Your teachers and classmates want to see your entire face. There should be just a small bit of headroom (space between the top of your head and the top of the frame) in your shot.
Hats, hoodies, and hair are all part of your individual look, but be sure to follow your school's guidelines and make your face available.
It's all in service of maintaining a connection with your teachers. Nonverbal cues are harder to read over the internet, if only because you're in a tiny box. Make the camera your friend.