Ballot Box Quiz - a quick quiz on voting systems in the UK
Here's a 10 minute multi-choice quiz on UK Voting Systems. It's a straight-forward quiz with 10 questions, four possible answers (with only 1 possible correct answer). Run this Powerpoint slideshow from slide 1 (ensure that you enable macros) and scroll through each question using the appropriate buttons.
You can make this a team challenge and separate your class into (up to) 5 teams. You can then assign a score to each team as you make your way through the quiz.