Highschool Party --- Revolve this whole party around highschool. Make sure you invite as many people it will seem more fun with more people. Give out flyers telling the basic information of the party, also have it at your house. For decorations use your school colors, and mascot. Try using cheaper stuff, like those plastic cups that can come in many different colors. Have music going when people arrive,(whatever type of music is in)don't have to many decorations or to much going on afterall this is a highschool themed party meaning its basic. Have a bunch of snacks out in bowls everywhere. A very basic party for you and your friends, cheap, fun, and school spirted!