- Open an umbrella in class and start running/walking around the class singing "sha-la-la-la-la, sha-la-la in the morning..." and ignore the teacher's attempt to get everybody to shut up. Get someone to join you.
- Get someone else to bring a water bottle that can squirt water and start squirting water in class and at the same time scream, "It's Raining!" While your friend and you run around the class under opened umbrellas.
- Name your teacher Mr. Bob, Bobsticle or the Chicken. And make sure they are aware of it. And the whole class calls the teacher by that name.
- Attempt to stuff an umbrella up your bra infront of the teacher and laugh hysterically after the process. Make sure the class laughs along with you.
- Torment the teacher about the story of the bra and aloe vera (I have no idea how they are connected, but...). Laugh really loudly after that.
- Name a teacher after a vegetable and proclaim to everybody how that teacher is your lunch. Infront of that teacher and make sure the teacher knows you are refering to him/her.
- Bring a water bottle that is able to squirt water and squirt a circle around the teacher proclaiming that it is to ward off bad luck.
- Tell the teacher he looks like someone in class and attempt to get them to pose for a picture.
---
Seriously, I am not joking. All this really happened in my class, Ask anybody.