Arman has been tutoring me for more than one year. (first in Pre-Calculus and now in Calculus). He is obviously very smart and solves all the problems I ask him very easily. But more importantly he expresses the solution and explains the concepts in a very clear and understandable way for me. I don't struggle understanding Math concepts anymore and my grades improved a lot. So when I saw his ad here, I decided to write this comment since I believed I owed him more than this for all of his favors and help to me.