This question is not a good fit for the Fix WordPress forum.

That said, a free plugin in the WordPress repository called LearnPress has the ability to quiz students and tracks their responses or score in their profile.

Another thought is Gravity Forms which has the ability to save form answers, they have a quiz and poll option too. Think JetPack saves user ft. Orm answers too. You can also integrate SurveyMonkey.com. Otherwise, you may want to Google LMS WordPress Plugins.