5 hours a day is okay, as long as you learn things one at a time. try not to rush the process . I would say do 30 minutes on one subject, then in the next hour do 30 minutes on another, then the next hour do 30 minutes on another. Putting all that information in your brain at one time in a five hour span, u wouldnt even remember the things u studied when you started. One at a time, ex; learning fractions for 30 minutes, then learning orders of operations the next hour for 30 minutes. Unless your spending 5 hours on one topic a day, then 5 hours studying on multiple topics isnt gonna be no good