Baycon Group offers a free Microsoft Excel 2007 Tutorial, among other Office, Photoshop, and Flash tutorials. The tutorial has very clear screenshots, some with added features (i.e. arrows) to ensure understanding. There are exercises evenly spaced throughout the tutorials to help reinforce learning. These online Excel courses offer a number of benefits, including advancing your career options.
Lesson 1 covers Entering Text and Numbers into Excel. The tutorial covers the main toolbars and buttons, as well as cell data and text wrapping. Shortcuts are taught as well. This section can be skipped by users with a basic knowledge of Excel, but it is a good refresher to those of us who haven't used it in awhile.
Lesson 2 covers formulas and formatting. Calculations, AutoSum, aligning, columns and rows, background colors, font colors, and basic features with text (i.e. bold and italics).
Lesson 3 covers the creation of Excel functions, filling cells automatically, headers and footers, and printing.
Lesson 4 is the last lesson and it covers charts and all of the basics of charting.