Question especially for teachers but anyone can answer: ways to impress?

Just be yourself! Sounds corny but it's true. I was a Drama teacher for three years--granted, it was in elementary school, but honestly, it was the kids that just had fun and didn't try to "stand out" that made the best impression. If you like what you are doing and are good at it, it will show. Be sure to get involved in productions and be a team player. Don't try to be someone you're not--it will show through eventually! Good luck!