If you need to learn Excel, Microsoft's Office Online site, has several free web tutorials for learning various parts of Excel. Go to the Microsoft Office Online training site and click on the appropriate software application name in the middle of the page.
Our SharePoint site has two Excel spreadsheets that contain keyboard shortcuts for Excel. One version is for Excel 2003 and the other is for Excel 2007. Right-click on the correct file name and choose 'Save Target As' to save the files to your computer.
Add an Excel Add-In