If you are new to Google Classroom, or need a refresher on how to set up a classroom Alice Keeler’s series of short YouTube videos offer practical advice on setting up your Classroom site and populating it with assignments.
Follow these instructions to invite your students to your Classroom.
If your students are not receiving notifications when you send them assignments and/or feedback you can refer them to this page.
If you believe students may not have received an assignment this post explains why some students get the assignment right away while others do not.