Thinking Worlds

Have you seen this? It's called Thinking Worlds from Caspian Learning. It is a free piece of software which you can download from this link. Once this has been completed, you can then download Addons (or educational games) from the list, for example; Electricity, French Revolution, Volcanoes, Problem Solving, etc.

When you enter this 3D World, you are given instructions on how to proceed. You can move your avatar around using the arrow keys.

To get started with the game, you move to the 'Beam me up Scotty' area, choose the subject area you want to work on and away you go. As you move around your new world, you will meet other avatars who will give you specific information or ask you questions on your selected topic. If you get these right, you can collect points which you can spend later on.

For the more adventurous of you, you can log in as an author and make editions to the games, change the questions and so on.

Definitely worth a look.