Every so often, check out cool tools you discovered a year or so ago and see what they've added. For example, here is an ImageChef word mosaic application.
You can fill symbols or letters with words. If your school starts with an "A", you can fill a letter "A" with words in your school colors. Or, each month you can fill the first letter of the month with words. Have fun. Remember to advocate for strong school libraries, strong students, and such!