
If you are using a laptop or computer running Windows, MacOS or Linux then you access Classroom through the web browser. The best browser to use to access Classroom and the other Google services is Google Chrome. Click the link below to download and install the browser if you don't already have it.
https://www.google.com/chrome/browser/desktop/index.html
If you are using an Apple or Android tablet or phone then you can download the Google Classroom app from the app store. Click the links below to access the app.
Apple - https://apps.apple.com/gb/app/google-classroom/id924620788
Android - https://play.google.com/store/apps/details?id=com.google.android.apps.classroom&hl=en_GB&gl=US
If you have an Amazon device then you won't be able easilly install the Google apps. (Google and Amazon don't like each other.) But you can still use the Silk browser to access Google classroom. However you would be able to access Google meet for live lessons and calls.
If you have any other devices such as a PS4/5, Xbox or anything that has a web browser then you will be able to access classroom using the browser.
Once you have the browser or the app installed the next step is to get logged in.
Open the app or open the browser and go to http://classroom.google.com.