Jonathan is a mathematics and engineering master's degree holder from Penn University, has been teaching high school mathematics, from algebra to calculus, for 17 years. With a wealth of classroom teaching experience, he transitioned to online classes last year and has extensive experience in explaining difficult mathematical concepts to students online. His students achieved the highest scores in the history of the national calculus exam last year, far above the national average. Jonathan's wife is a mathematics professor at a university, and she will be a visiting scholar in Cyprus for a year. As a result, the whole family will spend a wonderful year in the Mediterranean. Missing teaching and his students, Jonathan continues to teach online. Suitable for students who can attend classes from 6 pm to 8 pm Beijing time, Monday to Friday.