I actually attended the RISD precollege program and did fashion design.
A typical week was 2 days of elective/major (in my case, fashion) 1 day basic design, 1 day foundation drawing, and 1 day art history (for only 2 hours)
A typical elective day would be to go to a lecture hall, so to say, with everyone in the fashion major (it was the biggest major there) for about 2 hours, sometimes less and then we divided into our four assigned sections (there were about 20 people per section) each with a specific teacher and TA that you had for the entire session.
We were assigned weekly projects, mostly consisting of style boards with fashion illustrations and specs. our final project this year was called "Paperama" where we designed and made garments out of paper to be worn and presented by a "model" (which was usually just a buddy or someone you knew) at the fashion show at the end of the session. We didn't do anything with actual construction of garments (aside from the barbie project where we made outfits for a barbie to wear) but they didn't teach us sewing or patternmaking or anything.
Overall I pretty much enjoyed my time there (it was blistering hot though.. there was a heat wave on the day of the fashion show too.. fun). but I didn't live in a dorm because I live in providence.. so I don't exactly know how dormlife was.. but the dorms were pretty spacious and not bad.. at least from the dorms that I saw)
If you have any other question about RISD pre college, I'd be happy to answer