I give mathematics lessons for school students from grade 7 to 12(GS_LS_SE) and all university courses: Analysis _ Algebra _ Calculus _ Topology _ Statistics. At student’s home or by interactive live recorded session(Recorded for the student if he/she wants to revise what we have explained ). My teaching way is: The student sent me a PDF copy of the course we are going to discuss in order to prepare it well before the meeting for not to waste time during the session. I use this way for the student not get confused because of two different courses even if they are about the same issue.