BT and Barefoot Computing provide free resources for teaching computational thinking. You can register for free at Barefoot Computing and use these great resources to add exciting new contexts to your numeracy and maths.
Code Cracking
This resource focuses on the role Alan Turing and the Enigma machine played in deciphering coded messages during World War II. Why not use this as a context for maths during your WWII topic?
Want to see more about code cracking?