Follow the below steps to install this extension in your chrome or Mozilla Firefox Browser.
Step-1 Install Meet Attendance Extension in Your Chrome/ Firefox Browser
To install Meet Attendance in Chrome Browser - Click here
Step- 2 Connect Your Google Account With Meet Extension
Once the meeting is started find the button called "Show Everyone" in the right side corner, Check the image below,
You need to connect your Google Account for using this extension, Give the requested permission to continue with your setup.
Step -3 Create your Class Room and Spreadsheet
Meet attendance takes attendance when checking the list of people in the meeting, attendance is automatically sent to google spreadsheet.
Watch this video for a better understanding,