  QuizCram is an interface for navigating lecture videos that uses quizzes to
help users determine what they should view. We developed it in response to
observing peaks in video seeking behaviors centered around Coursera's in-video
quizzes. QuizCram shows users a question to answer, with an associated video
segment. Users can use these questions to navigate through video segments, and
find video segments they need to review. We also allow users to review using a
timeline of previously answered questions and videos. To encourage users to
review the material, QuizCram keeps track of their question-answering and
video-watching history and schedules sections they likely have not mastered for
review. QuizCram-format materials can be generated from existing lectures with
in-video quizzes. Our user study comparing QuizCram to in-video quizzes found
that users practice answering and reviewing questions more when using QuizCram,
and are better able to remember answers to questions they encountered.
