I'm a much better teacher when I'm high.
Do you seriously teach while you're on drugs?
Yes, and I'm damn good at it. Just watch me!
Teaching while under the influence of drugs or alcohol is wrong. You are putting yourself and your students in danger if you continue what you are doing since an emergency may arise, but you can't handle it because of your intoxication. You are also jeopardizing their education.
Just let me teach how I want.
It's good to each in your own style, but teaching while on drugs is not an acceptable style. It's only a matter of time before the principal of your school finds out and they fire you. For the sake of your own career, you need to stop using drugs before work.