The Cartesian plane was named after the mathematician René Descartes. This is now an outcome in the Alberta Mathematics Curriculum and somehow we made it through all our university math classes without needing that information.

The plane is a fundamental tool that can represent relationships between two variables. Most of that goes right over the heads of elementary students, but if you talk to them about the game *Battleship*, most realize they’ve already been using the Cartesian plane. Come learn how we teach the quadrants and coordinates.