Mr Haas has taken what has always been such a challenging subject for my son, and found a way to connect with him and get him to understand the material as especially when he stays during office hours, where he really does a great job of explaining the material to help him get the material. He is also very thorough in his responses to me so I know where his gaps are, what he needs to concentrate on to improve his grade, etc. Very grateful for Mr Haas.