This is an interesting idea.
If schools are included in the game, they need to be flexible, with a lot of player input and control.
Some people keep demanding that if there are schools then they have to have proms.
I disagree.
If there are school, then there need to be school dances, and they player should get to choose the details, such as is it a formal dance, is it semi formal (cocktail), is it casual? Is it costume?
What sort of music, and where does it come from? Will there be a band? (great tie in to my ideas for a bands pack) Will there be a dj? Will ti be on the schools old sound system? Will it be a jukebox?
How will it be catered? A fancy sit down meal? Cocktail buffet? Pizza? No food, just a punch fountain? Drinks in cans?
What will you name it? Is it your sims Prom? Is it their school formal? Is it a blue light disco?