Depends on what classes I'm taking in a semester, how many, & when they're scheduled. Last semester, I went in for about 3 hours Mondays & Wednesdays & for 5 hours Tuesdays & Thursdays. In my upcoming fall semester, I'll be going in for about 7 hours on Mondays & Wednesdays & about 2 or 3 hours on Tuesdays. Just depends on how I ultimately schedule my classes for a semester, but I will say that just going in twice a week is so much easier, ugh.
7 and 1/2 (6 and 1/2 for me, as I only have 6 classes instead of 7, so I show up to school a little later), Mondays through Thursday. Due to budget cuts my high school only goes 4 days a week.
I'm technically taking 12 hours of courses a week, but that 12 hours turns into about 24 hours on campus due to breaks, meals, studying, etc. I only go Monday through Thursday as well, so I have Fridays off!