Question

Mr. Lentini taught me a lot, but he was also the _______ teacher I ever had.

Answer 1

There are several words you can use, although the one that fits the question best out of all the choices is: Best.

Answer 2

you can use any adjective you would like
EXP:smartest,best,worst,tallest,fatties,stupidest,Dumbest,and...The homework teacher,you know the one that gives homework on a friday