Computer Science is not Word Processing. Office skill are important, but they aren't Comp Sci. Back in the old days, Computer Science was part of the Business department curriculum (at least it was in my High School), but it quickly spawned off to its own program in Science and went from there.
You need a two pronged approach. The first is word processing, spreadsheets, and some graphics. Good basic computer user skills. Gets the kids over their fear factor and gets them using the tool. From there you can branch to bookeeping or desktop publishing or Photoshop graphics or whatever.
Then you back that up with the underpinnings of good procedural and algorithmic skills and knowledge. It could be as simple as How to write a recipe for hot dogs or How to change a light bulb. No computer necessary in the early stages, you just want them in the frame of mind to get good at putting steps together and phrasing them well to get to a good result. Think of it as programming for the H.Sap2 processor (seriously, try it. Writing good directions isn't easy). After that, you are ready to introduce formalized language and coding concepts, then real languages like java, C, HTML, SQL, javascript, etc. How to make the computer do what YOU want it to do.
If you are basing this on MS Office, there is VBScript and Visual Basic. Useful tools, and it is all built in. But of course you have to be careful