Re: Dizzy and lightheaded, headaches
Do you feel that way on the weekends too? If it was the lighting, you probably wouldn't experience it on weekends when you weren't in the classroom (unless you had residual headaches, I suppose). Can you find out what chemicals are used to clean the classroom? Chemical sensitivity could be another reason for headaches.
I hope you find an answer REALLY soon. It's not fun to feel like crap; I totally understand that!