It is way too much work to brief every single case for all the first year classes. I mean, it's really, really f-ing ridiculous amounts of work. Taking the advice of some upper classmen and attorneys I work with, we have created a "briefing" group of six or seven people. We assign who will brief which cases each week and then email our briefs to eachother.
Otherwise you will drown and get burned out really damn quick. I would suggest you all do the same. Everyone carefully reads all the cases, but you only brief 4 or 5 each week, so instead of 20+ bad briefs, you do a few great ones. Members of our group have been called upon to brief in class and, relying on each other's briefs, we have done great so far.
I save at least 10 hours, probably, each week doing this. Then you can focus on learning the material and using your study time more wisely and keep your sanity.