Hands down the best, most intelligent teacher at Moira (and possibly the entire county).
the best chemistry teacher, made it fun and easy to learn.
Mr. McMahon was the best science teacher I've had in my entire high school career. I took his class back in 1999, but he left to work in admin. Glad he's back. 5 Stars!
Excellent teacher! I majored in Chemistry because he made it so interesting.
Best teacher I've ever seen blow up a balloon full of hydrogen.