Google classroom is an online service for creating educational resources, or in other words, classes.
classroom provides quick integration with other services such as Gmail, Disk and Dock, which also belong to the package of free Google Apps for Education services.
The classroom was created as another Google service that can be used for education, as well.
This is done so that teachers can give assignments to students and evaluate their work, as well as make various informational announcements.
Google classroom is an online service for creating educational resources, or in other words, classes