Minecraft has been used for classroom education and for real-world community devlopment. However, for some it can also contribute to their mental development.
Hur Minecraft lärde min 9-åriga son med Aspergers att skriva och läsa | Anna Stam
This article in Swedish tells of a 9 year old with Aspergers syndrome who always had trouble learning, especially with communicating. However, Minecraft encouraged them to improve their reading and became part of their specialised education program.
An automated translation of that page can be read at:
How Minecraft taught my 9 year old son with Asperger's to read and write (Google Translate)
If anyone is interested in using Minecraft in the classroom, I recommend you also investigate MinecraftEdu