FIVE categories with FIVE questions per category, plus one final jeopardy question (with music, though I recommend giving most students two rounds of it to write an answer). Fully editable and customizable; fully hyperlinked and quickly/easily navigable enough for a student to run by mouse / presenter-device (if desired). Nice sound effects. Score can be easily kept on a whiteboard, paper, etc. by a student or the teacher. For teachers seeking the cheapest buzzers I've seen, I recommend Educational Insights’ “Eggspert” products (which allow for six groups/teams/students to play).