Fun Ideas & Experiments
People like money.
People will stop whatever they're doing and pick up a quarter if it's on the ground, even if they're in a hurry.
Glue a quarter to the ground in a semi-crowded area. Sit back and observe people's reaction. Count how many stoop to pick up the quarter, how many make more than one effort to pick it up, how many get angry when they discover they've been had, and how many ignore it.
Teachers like it when their students participate in classroom discussions
If teachers discover that students are more likely to participate if the teacher behaves in a particular manner (consciously or subconsciously), students will be able to control teacher behavior.
This requires a full class effort. Tell each student only to raise his or her hand and participate when the teacher is in a certain section of the room. Record how often the teacher goes to that section of the room during class discussion (if you have your class do this, make sure the experiment is conducted on a teacher with a sense of humor that can neither get you fired nor beat you up).
It really doesn't matter what you wear in high school. If you're cool, other students will follow you.
Popular kids dictate fashion trends.
Warning: handle this delicately. Find an extrememey popular student in the class, the class hottie (as determined by students (not you)) works best. Instruct him or her to wear something completely out of fashion the following day, something that you or I would be poked fun of for wearing. Record peer reaction.
Teenagers love drama.
Teenagers will believe almost anything if it makes them feel like life is more exciting.
Start (harmless) rumors. Tell students to start a rumor that you've been fired because you said "God bless you" after someone sneezed, for example. See how fast it gets around the school (warning: I started a rumor similar to this and before the end of school I had teachers coming to my defense and an administrator telling me she would testify on my behalf).