I am a HS junior taking Calculus BC and have probably one of the most difficult teachers to ever exist ever. Her first test was tear-stimulant and she offers absolutely no practice sheets or problems, other than the relatively simplistic examples she gives in class.
Which leads me to my next point: Are there any particular websites with repositories of these difficult problems? The majority of sites only explain basic concepts and simple problems to apply them to, which is useless for me. If you know of any very challenging Precalc/Calc websites( OR BOOKS) , please link them here.
(Mods and experienced users: I am still very new to StackExchange in general. Sorry if this question is in the wrong community, and please redirect the question to the correct one if it is.)
EDIT: My little brother is a sophomore in Precalculus and would like the same thing- any other links?