WP-Pro-Quiz is hands down the best WordPress quiz plugin I've come across!
I've tried a bunch of other quiz plugins in the past and nothing even comes close to what this one has to offer. At this time, among many other great features, Wp-Pro-Quiz supports six different types of questions, all of which allow you to include media (images, videos, sound file, whatever you want).
A big thanks to Julius for creating and maintaining this amazing plugin! I will definitely be using it a lot.
Vielen Dank, wirklich super! :)