Sharepoint suitable for a training site?

I have put together a few training sites within SharePoint and have seen the most success with community driven sites. These sites can be moderated by either "champions" or "ninjas" or people who own the portal. Community sites allow for discussions to be viewed by all and have actual questions answered if the training they are looking for isn't on the site. I use the Community site template and the discussion capabilities for this. I then use lists to build an appendix of all the training that is out there with appropriate metadata so it can categorized, searched, filtered, etc. I normally then use tiles so people can drill into the subjects they want to learn about (very similar to this site now). Another good thing to make sure you build out is the search experience. You could add a vertical refiner to the overall search page that goes back and only searches your training content. I have seen Videos be some of the most effective training tools. I do believe that building a nice portal for training isn't too bad but getting really good training materials that people actually want/need can be hard.

One good option for smaller teams or if you want to distribute a larger training deck is OneNote. It is very intuitive to use and has great searching and categorizing. I have fully shifted from team wiki's to team OneNote's to build knowledge bases.