Since I am a full time Google Spreadsheet consultant, with clients all over the world, I know what are the things that are important and should be taught to students.
Google Spreadsheet gives you a lot of options to present the data and use it appropriately. While basic function is used to do basic stuff, by using the same basic function in a more intelligent way, can give you result that in otherwise, would seem a lot of manual work and calculation. There is no end to complexity of a function. Some examples are:
This course compels you to think in right direction by giving some example, so that in future, you can create your own functions in tough times.
Happy Sheets !!!