The link to your class should have your agenda and many materials from class each day. You should start here if you have lost your homework copies or if you are absent. Use the email link if the assignment has not been posted yet for the day.
On the "links" tab (see right margin) are quite a few links to some video site for chemistry, physics, or all subjects... please look up topics that you are having problems with to get additional information!
The FAQ tab will give you some of quick answers to common questions asked about absences and grades.
If you need to set up Google Classroom, my codes are listed at this link: