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I do believe it would be possible and advisable to create an interactive medium on the web that leverages spaced repetition and maybe integrates with other apps to periodically remind you or quiz you on facts you should know. It's an intriguing idea.

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I agree as well. The kicker here is that the resource has to be well developed, comprehensive and use effective ways to teach the subject. Most online courses I've seen aren't comprehensive, don't really have any effective tools and are sloppily created overall.

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