Right now, high schools have a prime opportunity to raise quick money: prom season. U.S. families whose kids are going to their prom are expected to spend an average of $1139 - per family - in 2013.
Here's one example of how to translate that spending into fundraising capital: Make a list of all the businesses that prom-goers will patronize (e.g. florists, restaurants, tuxedo rentals, shoe stores, dress stores, nail and hair salons, car washes...). Contact these businesses, tell them how many kids are expected to attend your school's prom and how much prom-goers are likely to spend, and ask businesses to donate 30% of their profits during the two weeks before prom to your school's PTA/student council/other. Explain that in return, your school PTA/student council/other will urge prom goers to patronize their business via posters placed throughout the school and community, the school paper, community papers, social media, the school website, etc.
Already had your high school prom? There's always Homecoming ..