Bio: Professor, Columbia University. Founder, The League of Exceptional Tutors. Optimist.

Bio: The Desmos Demon himself🔥

Bio: I am the founder of the tutoring company MVP Learners. In my free time, I like fishing, biking, sports, and video games.

Bio: I run SAT Hub - 1600, the fastest & most effective community to help you get 1500+ on your SAT test.