If you receive an email containing a calendar invitation from your teacher, below is a picture of what it will look like in your email. Click Yes to add the meeting to your calendar. Note the date and time. Once the appointment is added to your calendar, you can click on it and set notifications for yourself, as explained in the video above. Meeting invitations sometimes end up in your Updates folder in Gmail, so check it frequently.
Google Calendar can remind you about assignment due dates, exams, meetings with teachers, and after school activities.
The video below explains how to create calendar events and notifications. Download the Google Calendar app to your smartphone and you'll also get your alerts on your phone.