Answer:
I am the greatest teacher out of them all, but alas in the end I kill my pupils.
Jack and Jill when up the hill jack fell down
The higher I climb, the hotter I engage. I cannot escape from my crystal cage.
What word is the same written forward, backward and upside down?
I climb higher when hot, But beware my rage, I’ll kill with a breath, If I can escape my cage
You use it between your head and your toes, the more it works the thinner it grows.