Complete the steps on this page to create a Google Sheets add-on that tracks attendance for Google Classroom courses delivered using Google Meet conferencing.
Nice spot via @barrielroberts/@alicekeeler for an official Google Apps Script quickstart which combines Google Sheets, Google Classroom and Admin Reports which lets you create an automated Google Meets attendance roster tool. The quickstart has all the code and instructions you need to get this working.
Source: Quickstart: Check student attendance in Google Meet courses
Google Classroom has become one of the darlings of the teaching world that has come out of this crisis. Its shallow learning curve and attractive UI made it an obvious choice for most educators. Oh, and I am sure the fact that it is free helped too.
One of the limitations is that you cannot simply upload grades from, say Google Sheets or another assessment tool. Well…not directly in the Google Classroom platform, yet.
This tutorial runs through the basics of uploading grades from Google Sheets into Google Classroom using Google Apps Script with the Classroom API.
Source: Google Apps Script: Upload grades into a Google Classroom Coursework Assignment – Yagisanatode