Ph. D in pure mathematics and passionate to share a personal way of understanding basic mathematics.
There are 15 categories in the playlists:
1. Mental Math - for everyone interested in arithmetic calculations
2. Ask Dr. Chen - to answer any question you left in your comments
3. Math Games - for everyone like to play with numbers or logic thinking
4. China PS Math - to show how teachers in China teach elementary students
5. China MS Math - to ... middle school students
6. China HS Math - to .... high school students
7. SAT prep - aim for helping students who is taking SAT math exams
8. College Algebra
9. Precalculus
10. Calculus I
11. Calculus II
12. Calculus III - Vector Calculus / Multi-variable Calculus
13. Mathematical Reasoning
14. Probability and Statistics Intro.
15. Differential Equations Intro.