Your key goal when it comes to making an eLearning course rigorous enough to be worthwhile should be to balance that with an attractive presentation that makes learners want to work hard. Loading up a bunch of dense concepts and content with hopes of testing them on it doesn’t fit the bill anymore. That may work, to an extent, in a lecture format in person, but there are too many factors diverting an eLearner’s attention for this to make any sense online. Ensure your testing has weight. Make sure that you don’t gift your students the answers in lieu of having them figure those out on their own. However, make the learning process to get to that testing entertaining enough for them to care. Utilize multimedia to your advantage. Create textual references and connections that both challenge them as readers and force them to think about the concepts on new terms.