RongXi (Bill) Guo, graduate of the University of Toronto majoring in Math and Physics. Bill specializes in teaching a wide range of subjects, including OSSD Grade 9 & 10 math, Grade 9 & 10 science, Grade 11 physics, chemistry, and math, Grade 12 physics, chemistry, biology, advanced functions, data management, calculus and vectors, as well as AP calculus AB and BC, AP physics C, and IB chemistry SL. Bill has been an active participant in math and science contests since my high school years. Moreover, Bill has dedicated his time to training students for various competitions, including the Sir Isaac Newton (SIN) Exam, COMC, Hypatia, and Euclid. Through guiding students to excel in these contests, Bill also possesses a strong ability in nurturing students’ problem-solving and critical thinking skills that will undoubtedly benefit them in the future.