Alternatives to Excel

If you need to make a spreadsheet for your charts and graphs, you may use Excel. However, Excel is expensive and I do not expect you to purchase it for my class (especially since I don't use it). There are some great free alternatives. Please get parental permission.

OpenOffice is a free, open-source alternative to Excel. You have to download and install it. I have used it and can say that it worked well for me.
http://www.openoffice.org/

Another free spreadsheet is offered online through Google. No download is required but you have to sign up for a free Google account.
http://docs.google.com