I've created a few bookmarks in Google Earth which I use to show students where certain famous mathematicians were born, lived and died. I've found it useful for students to make connections and see that the mathematicians who invented the stuff...
This is an Excel file which is used to display Eratosthenes' Sieve on a projector.
Use the Format Painter to change the colour of the appropriate cells to demonstrate how the sieve works. If you double-click the Format Painter button on the...