As a security measure, some activities in Classroom have limits depending on the type of account that you have.
The value of these limits can change without notice to protect Google's infrastructure.
|Activity or feature||Google Workspace or school
|Personal Google Account|
|Teachers per class||20||20|
|Class members (teachers
|Classes that you can join||1,000||100 maximum, 30 per day|
|Classes that you can create||No limit||30 per day|
that you can send
|500 per day, per teacher||100 per day, per teacher|
|Guardians per student||20||Feature not available|
|Email address visibility||No limit||Feature not available|
|Topics per class||100||100|
Note: You can invite more than 20 teachers, but only 20 teachers can join the class.
Classroom uses Google Groups for all students and teachers with a Google Workspace for Education account.
- Each person can only be in a certain number of groups.
- If you invite a group to join a class as co-teachers, the group must have 10 or fewer members.
For details, see Understand Groups policies and limits.