We have modules for content, questions, review, and feedback.
Let's start with content. Video allows for you to either upload or pull a video from the library. You can even use a YouTube link. Image allows for you to upload an image or pull one from the library.
Text or HTML allows for information to be typed into the module. And library content allows for different types of content to be attached from the library, like PDF Questions give you the option of three types of questions for quizzes and exams. Multiple choice, multi select, and free text. Note that free text is not graded automatically, but is a free form response.
Review has two types of modules. Missed question review and submit and score. These two work really well in a pair. First, by placing a submit and score to get a grade and then following up with a missed question review module.
This module goes over all list questions and has the user retry each one until they get them correct.
Feedback allows you to ask your users to provide feedback the content they're taking. We have a module for confidence and satisfaction.
External content is similar to third party content, but is not related to iframe. This would be used for any standard URL.