Google Classroom is an assignment distribution and collection service. It was rolled out in August of 2014. Many school districts, including mine, were given a preview before it was released. The service is web-based so there is nothing to install. Any browser works with Google Classroom but I recommend using the Chrome browser.
A Google classroom must be created every year and assignments must be re-created every year. As teachers, we don’t teach the same way each year but the materials and resources remain fairly consistent. It would be nice if we could refer to these resources without the need to re-create the classroom and assignments.