How can I get my business users more computer savy?

I work for a small company about 15 people. A major portion of my role is Software Development and Analysis of business needs. The rest of the people in the office are non IT and it is understood that I am available to answer their questions. Often times I am shocked at how little they can do with their computers. 100% of their work day is spent in front of the computer using word, powerpoint, and firefox. Is there a test or guide that can be used to say “hey you business users, this is what you should be able to do, and if you can’t you need to get up to speed fast” ?