Teaching children can be difficult...It requires a lot of patience and understanding and also genuine interest. You can't have a bad day and take it out on kids. They are just kids, what do they know. I love children and I love spending time with them. Even the very stubborn ones. When you get to know them of course by interaction you discover that they are just as pure and innocent as every other kid.
I'm glad your son grew with his mother and I'm glad you were quick to notice the effect school was having on him.
Thumbs up!