Hack Education. While I have never played the game I'd like to mention it due to it's innovative look and educational potential.
This looks to be a wonderful to tool to engage students in a visual and intriguing way. The educational version allows a teacher to turn their classroom computer into a server to host their virtual world(s). A teacher has moderation controls which is nice, the ability to add/remove items from the game, and more. One feature that is still to come will allow students to go on virtual field trips around other users Minecraft worlds.
I highly recommend checking out MinecraftEDU by clicking here!!!