I have only been to Winter school programs(term 2 holidays also was TSSM) for MM and BM unit 4, now I don't really see a need for either of these personally as I the time is too short to derive much benefit from the teacher, the notes were good but for maths there can't really be any more notes than a textbook gives, and there are magnificent notes for BM here
http://notes.vcenotes.com/?step=downloader&download=236 [shinnys notes, these are all I used to revise]
I also went for chemistry, it was alright a tad confusing but did help in class from recognition. If I had 'kept the knowledge alive'/[not ignored Chem] the benefit would have been many times greater. The lecture for chem was good though the teacher was a bit boring also the notes were really good they covered the course well, I used them lots.
These were good as they forced me to study, though I could've covered more by myself except for chemistry :buck2: