Chassin is very scatter brained but super intelligent. He's willing to help you if you seek him out. I had him for three years through Chemistry, Chem 101, and Physics 131 and 132. One of the best teachers I've ever had.
Best teacher in the entire school by miles. Absolutely the most important asset to Warsaw Central School. When he leaves, that place will be a complete wasteland of inadequate and under educated teachers. He has had a profound effect on the lives of many students who gained a love of science from his teaching. Tests are easy enough, anything less than a 90 indicates you don't pay attention or don't want to be there. Can't reinforce enough how great of a teacher he is. Truly a legend.
Not gonna baby you, but knows his stuff and if you pay attention you will know it too.