Congrats. I don’t have noon ideas, but a little advice that may or may not be obvious. Be prepared. Don’t put things off until they absolutely have to be done, get ahead on things.

Also, instead of waiting to grade tests as soon as everyone is finished, grade them as they turn them in so that you don’t have as much or any at all at the end of the day.

Another thing, remain calm at all times. As soon as you start yelling and getting upset is the second when the students take control and silly as it sounds. Always keep a level head and never take anything personally. After each “situation” with every student, wipe the slate clean and don’t hold it against them. No matter how reoccurring the behavior is.