Missed lessons: it is your responsibility to catch up with the work before the next lesson. This is in the school rules. It is also really important if you want to have all the work for tests. You will not get any sympathy or test concessions if you do not catch up as the resources are here !
It's ski break, so no homework BUT all of you have projects on going, so if you want to spend time on these - like 20 minutes - that is fine. But this is not compulsory!