Skills in Microsoft Excel Lesson Plans/ Lesson Plan Ideas/ Teacher Tools that Incorporate those Skills
Tutorials for those Skills (these tutorials cover a variety of versions of Word and you may have to adapt the instructions to fit your version...and sometimes there are pieces that are incorrect because of the difference in versions)
Basic Data Entry
cell names
click, tab, or enter

Basic Formula Writing
=sum()

Chart (Graph) Making

highlight cells and use Chart Wizard

bar graph

Formatting Cells
cell background color

color text

Printing
print area
print preview
gridlines

Together:
M&M Math intro

More M&M Math

On Your Own:
Lesson Plans with Data Entry & Formula Writing
an introductory exercise in Excel with higher level math (designed for students at Cal Poly):
Your Fortunate Fortune

Do Vampires Really Exist?

Buy Your Dream Car

Code Crackers

The Big Allowance

Money Changer

Magic Squares

Lesson Plans with Data Entry, Formula Writing, AND Chart Making

One Grain of Rice

How Much Water Does Your Family Use?

Advanced Stuff
Geography Geometry

A large collection of Excel tips and tricks (quick how-to's)
http://www.exceltip.com/se/10.html

This tutorial shows you the basics of Excel (assumes very little prior background) while making a gradebook (Bob Hope and Eddie Murphy will be in your class!); so you'll learn many of the skills listed to the left while learning how to make something useful in Excel
http://storywind.net/education/mccarthy/lessons/exceltutorial.html

A nice introduction to Excel with lots of screenshots
http://www.functionx.com/excel/Lesson01.htm

This brief introduction to Excel includes formulas, charts, and formatting cells
http://www.bcschools.net/staff/ExcelHelp.htm

A tutorial on different types of graphs and how to make them; Section 1 uses an example you may not have, but you could apply it to your M&M data to learn some of the features. From Section 2 to the end, it shows a data set that you could type into Excel in order to follow the rest of the tutorial.
http://psdam.mit.edu/RISE/tutorials/excel/excel3.html

This introduction to Excel is based on 5th grade science standards about weather. It's from Canada so all the measurements are metric but the Excel is the same. ;-) You can download their sample Excel file so that you can follow along on the tutorial.
http://www.quasar.ualberta.ca/edit202/tutorial/spreadsheet/ExcelBasics/ExcelBasics.htm

Sections 1, 2, and 3 of this tutorial are nicely done for introducing you to spreadsheet basics, formula writing, and chart making; Section 4 is really cool stuff but it is an engineering example (calculating maximum fiber stress in a homogenous cantilevered beam); don't be frightened by it...learn something new!
http://psdam.mit.edu/RISE/tutorials/excel/excel.html

All about printing
http://www.functionx.com/excel/Lesson03.htm
More Chart Making
modifying colors, backgrounds, titles, and more

adding text boxes, lines, and shapes "on top" of a finished chart
Ambidextrous Graph

Full lesson plan for ambidextrous graph
http://math.rice.edu/~lanius/Algebra/rightleft.html

Using Excel WordArt
http://www.smartcomputing.com/Editorial/daily/dailycontent.asp?guid=&did=970

Though not a complete tutorial (they get you started then want you to pay for the rest), this will get you started nicely using WordArt
http://www.elementkjournals.com/premier/showArticle.asp?aid=1217

How to insert clipart in Excel
http://www.techtrainteam.com/services/olt/office2000/xls-a7.html
Clip Art

Word Art

Single Use Spreadsheets

Resize Columns and Rows
format, manual change,....

Print
print area
borders
gridlines
Make your own graph paper/grid paper (see M&M Math and Ambidextrous Graph lesson plans above), make specialized paper including music staff paper

Make Word Search puzzles

Grid Paper & Scale Drawings

Plan Your Garden with Excel
Nice tutorial with a simple example about columns and rows (width, height, hide, unhide, format, etc.)
http://www.functionx.com/excel/Lesson02.htm
Using Excel as a Mini- Database
sorting
importing/ exporting data
Lesson plan for using spreadsheet as software
Tutorial on sorting using buttons or menu dialogue
http://www.extension.iastate.edu/Pages/Excel/unit4/sorting.html
Advanced features
absolute references in formulas

macros

Tutorial on absolute references
http://www.extension.iastate.edu/Pages/Excel/unit4/absolute.html
Resources for Integrating Spreadsheets in the Curriculum