Things to help with your choice

Most school formal commitees go with using the school colours but that's not a rule. Think of some fun colour combinations that can be used for your whole colour theme.
The basic package that schools begin with is 100 Balloons for the dancefloor and a table decoration of 3 balloons for each table.
Balloon Boutique has some great feature designs to make a basic formal into something fantastic. Whether it's an arch, sculptured school initals, balloon drop, balloons on the dance floor or a balloon curtain.
With enough time Balloon Boutique can organise a banner with your school logo and the year of your formal on it. It's a great idea to get everyone to sign it at the end of the night.