At that point you're not doing group work. You're doing individual work with differing assignments. Group work is the reality of the world. You can be the best

At that point you're not doing group work. You're doing individual work with differing assignments. Group work is the reality of the world. You can be the best and your company can fail because of crappy peers. Speak up, lead them to greatness and give them the boot (ie, tell the teacher) if they're hopeless.