Study Egg is a service that is offering quizzes based on video lessons from Khan Academy, MIT Open Courseware, and TED Ed. The premise is quite simple. Pick a topic that you want to learn about in the library of videos. Each video has a a series of questions attached to it. When you answer a question Study Egg will immediately indicate if you answered correctly or not.
Applications for Education
Study Egg isn't a revolutionary idea by any means, but it could be useful for some students to use as review activities before an assessment.