Answer:
No, I do not think that Mr. Escalante treated Angel fairly throughout the movie.
It is because Angel was punished unfairly by Mr. Escalante in the movie.
Explanation:
"Stand and Deliver" is a movie based on real-life story of a teacher Jamie Escalante, a mathematics teacher in Garfield School and his teaching ways to help deliquent students come out of their corrupted lives and live a good life.
Throughout the movie, we can see Mr. Escalante treat Angel unfairly. He has been rude to him. In their first interaction Mr. Escalante and Angel both behaved badly with each other.
Though at times, Mr. Escalante's treatment towards Angel seemed unfair, it helped Angel to come out of his deliquent commarades.