Dalian Scholar Education heard that a teacher named Olympic Mathematical Zhang heard that it was very good, especially suitable for top students to study. What are the grades? Are there all primary schools and junior high schools? Teacher Zhang is very kind. His lectures are simple and clear, and his speeches are written by himself. 10 years of teaching experience summary, even the best handout in China. The topic is typical, impartial and completely enlightened. If children like math very much, I suggest you try it. Personally, I admire Mr. Zhang, the industry leader! Good people, respectable people!