Before you do any lab work, you need to be safe. This page will instruct you on basic lab safety!
If you happen to have a chemical spill, you should first figure out what was spilled. Next, you should probably tell the teacher because this could be extremely harmful. Next, you should try to consider ways that you can clean it up.
As you use sharp tools in the lab, it is very possible to cut yourself. You should put pressure on the cut and elevate it. Then, go and get some cold water on the cut. As I've said before, go tell the teacher if this happens.