The encyclopedias are useful educational tools and the better-known digital encyclopedia is WIKIPEDIA, despite now a new digital encyclopedia exists in almost 30 languages that are an emulator or rival of Wikipedia.
The name of the rival encyclopedia is UNCYCLOPEDIA. This encyclopedia is not very well known; for example only in GOOGLE it does exist if you try it to look for. The difference is that UNCYCLOPEDIA in addition to 24.000 articles has the news (In the News).
The subjects of this new encyclopedia are: politics, people, science, games, history, computers and other items.
In summary: I recommend knowing this educational tool and using it in the academic activity.