I want to state in advance that I appreciate your help, especially on the backhand! Regarding the USPTA course: you mentioned the serving section. Did they require that you hit a topspin serve? And: Can you fail to get level 3 because, say, you don't correctly identify stroke errors? Also: do they provide study material clarifying what they want in the lesson format? I guess I'm also trying to figure out how mistakes are weighed. Is there a point system with an absolute pass/fail line? Thanks and sorry for endless follow-ups.