A silent auction of items or services is a good way to raise money. Local businesses are often willing to donate auction items. Place each auction item or description of services on a table with its corresponding bid sheet. Assign each participant a number, and allow them to bid by writing the dollar amount they are willing to pay and their participant number. If someone is willing to pay more, he can also write his bid and number. Whoever has the highest bid "wins" that item or service. Staggering auctions so they end at different times will encourage people who did not win one item to bid on another and may help raise more money. An eBay auction where the proceeds go to your charity can work as well, as long as there is a good viral marketing campaign.
A passive fundraiser will reach parents and others who are willing to donate to the school, but who do not want to buy things they do not want or need. To implement this easy fundraiser, send a letter home with students requesting donations of items. Encourage parents to check with their employers to see if they are willing to match any donations made by the employee. Reminder emails, letters home, and class contests can increase participation in this event that yields many useful items for the school or group.
Another easy fundraiser is to have a dinner for students and parents. Either spaghetti or pizza are inexpensive and easy to make. Your local pizzeria may offer a discount for schools or large orders. Charging $2.00 for a slice of pizza is often satisfactory. The dinner can be held in conjunction with a PTA meeting or another activity such as a school play or science fair to increase turnout.