An impressively thorough report on Friday's protests. Even for you non-francophones, check out the video at bottom to get some idea of the scale of the march.
It's hard to know what will happen tomorrow. The report above says there will be a meeting at the university. The professor I met yesterday said the teachers would demonstrate. Various expats I've talked to have said that they've heard the students will try to march again, specifically to take the road that they were prevented from taking Friday (which would have led to the police headquarters). Some say it's calm today because they're all regrouping.
Updates as events warrant.