Questions for Investigation
1. Find a Latin square of order two. How many different ones are there?
2. Prove to yourself that an Euler square of order two does not exist.
3. Find a Latin square of order six.
Online Resources
Teddy Town is an interactive game of Latin squares for 6-7 year olds.
4x4 Euler square shapes can be printed and cut out to create a game. See [7] for the the accompanying article and instructions.
Constructing orthogonal Latin squares is an applet by Alexander Bogomolny.
Elaine Young, "Euler Squares - Questions and Resources," Convergence (May 2011)