I recently made a post about various tutorials/lessons/guides I was working through. Below is the beginning result of some of that work. In the next few weeks it will hopefully morph into a much more functional teacher tool, but for now I have it pull data from a spreadsheet where I keep grades. That is incredibly useful to me since I have yet to find an online gradebook that is even half as functional as a decent spreadsheet.
And here is a link I found very helpful (and it is even geared towards teachers!) in navigating the powerful functions available in Google Sheets. I learned basic functions in excel a long, long time ago, and never really found the need to progress too far beyond that. This video just helped me work out the exact formula I needed to fill some columns in my gradebook. Cheers, Mary Page!