With many thanks to @Moody, we now have Google Sheets versions of the spreadsheets used in the course. Here they are:
Note that you can click
Make a copy to get an editable version in your own Google Drive.
If you see any problems with the sheets or have any ideas for improvements, let us know!
The graddesc version needs some kind person to write macros to make them work the same way as the Excel version - if you manage to get this working, please request edit access on the doc so I can let you edit it to add this functionality.