For SAT/ACT prep I rarely, if ever, take more than eight students. An exception is when I work with schools to do prep in a classroom environment. I feel that any more is a disservice to the students. For specific classes, the number of the students is lower. Doing groups sessions usually requires the students to be “close enough” in their capabilities.

As a mentor, I am also a resource manager, pointing the students in the direction of already existing resources when they exist. One source that I recommend is Khan Academy to help with SAT practice. A source of general practice I recommend is PurpleMath.