What Should I do About This problem?

I would get out of that job, and transfer to a new school without any slackers. Hopefully the gr is greener on the other side. You could, but I dont know if you would want to, speak to someone in a higher position than all of them and complain. Thats not right for some of that stuff to be going on in a high school, especially the guy who smokes weed, you could get him in big trouble if they drug test him randomly.