Teacher Invaders uses a video game format to provide drill and practice for 25 bookkeeping terms. The object of the game is to score points by answering questions correctly and zapping the advancing invaders. Users get playing time at the beginning of the game and additional time by answering bookkeeping and accounting questions correctly.
Each gamer has three (3) lives. A life is lost by answering a question incorrectly or getting blasted by the invaders. Each correct answer provides ten (10) seconds of playing time. If users correctly answer three (3) questions in a row they earn bonus time for playing the game. Zapping the invaders is accomplished by moving the mouse left or right and clicking on it to fire.