I'm no expert on Excel, but I generated a tutorial nevertheless ... in the form of (what else?) a spreadsheet.
A piece of one of the pages looks like this:
Click here to download the spreadsheet tutorial.
P.S. Here's a chart from the test, at the end of the tutorial:
There's also a tutorial (in the form of a spreadsheet) of more basic stuff.
RIGHT-click here and Save Target to download the .ZIPd tutorial.