I'm not going to write an entire speech, mainly cause I don't have enough time, I would. if I could. But I'll give a little bit of a push towards your speech points.
you can always use the opening,
"A teachers responsibility, their duty, if you will. owes to the student(s) entrusted in his or her care; by enforcing knowledge and understanding of the subject at hand. Many teachers forget their responsibilities, and the students suffer for it."
