Online quizzes can be an effective and flexible means of helping learners develop key skills in
probability and statistics. Quizzes give instant feedback, to help reinforce correct understanding
and eliminate fundamental errors at an early stage in learning. We will describe our experience of
designing and using quizzes with non-specialist and specialist students, on several different
platforms including, most recently, Moodle. We describe Model Choice, a tool that helps students
identify from a brief scenario the standard family of probability distributions they should work with
to solve a problem. We will emphasize key design aspects of a successful quiz system, such as the
importance of giving informative feedback to the learner. Using a standard platform, such as
Moodle, is likely to require some compromise on design principles but building a stand-alone
system to implement ideal design choices is very time-consuming
