I found these great sites where you can search for your name in either Pi or the mathematical number e. This would be a great way for students to get engaged about what Pi and e is. The program converts you letters to base 27 (using modular arithmetic which I just posted about.) The digits represent letters. This could be a great end of the day or beginning of the day activity when you are going over what e or pi is.
The two websites have what "base 27" means and the some random facts about what animal, planet, name come first. It would be a fun activity for the students to do at home and record their answers, bring them back to class and see who has the first, second, etc...
Here is to search your name in pi: http://www.dr-mikes-maths.com/pisearch.html
Here is to search you name in e: http://www.dr-mikes-maths.com/esearch.html