Caesar Cipher Search (five times fast...)

I've been getting a lot of hits from people google-ing "Caesar cipher." For that reason, and also because it's so cool, I'd like to direct you to the University of Southampton's National Cipher Challenge. The "teacher's pack" is full of lesson plans, worksheets, and a printable cipher wheel.

Check it out: http://www.cipher.maths.soton.ac.uk/rules.html