Open Shield and navigate to Browsing
From the top bar select User summary.
This will display summary data for the browsing activity.
Select the Time range you would like to check.
It can be Today, Last day, Last 7 days, Last 28 days, This month and Custom
Select the Scope of users you want to audit.
It can be Domain, User Org. Unit, User group, Classroom, User or Device OU
Select the Classroom you want to see.
The browsing activity will be displayed below.
View Top users by time on sites, Top users by site views, Top sites by time on sites, Top sites by site views, Top tags by time on a tag, Top tags by tag views.
Those charts can be exported into a PNG or CSV file
As an example, if there is a Tag created for Classroom ( click here for more details)
You can view the classroom users’ activity in classroom.google.com