Noughts and crosses, sometimes called Tic Tac Toe, is a simple game which has been handed down through successive generations of people.

The game is thought to have originated in England centuries ago. (Interestingly Tic Tac Toe is virtually unknown in Germany ). As school children we have all played O's and X's ( I seem to remember it as a 'spatial adventure' the child next to me passed on in Grade 4. We played it at the back of the room, out of sight of the teacher if we were bored.

But ! : In retrospect the two of us were actually investigating geometrical relationship and simple game play rules and conditions. We were 'self learning' important ideas. 

Lesson concerning Noughts and Crosses which the Constellations group sends out in its lesson notes with its computer series.