For breadth and content, there's no beating Wikipedia. There are some issues with one-sided moderation, but that's true of the paper encyclopedias as well. But

For breadth and content, there's no beating Wikipedia. There are some issues with one-sided moderation, but that's true of the paper encyclopedias as well. But having a non-internet reference is very good because it encourages learning and curiosity in a way that a website just doesn't. The main thing that's wrong with Wikipedia is that every other distraction online is just a click away.