You can change your Google Classroom password via the Settings menu, but note that this changes your password across the range of Google programs.

You can add multiple Google accounts on your Android device. However, it considers the first account you sign in with as the default and uses it to sign you in across various Google apps and services.

Gmail, along with the entire Google Workspace suite, has apps for Android, iPhone, and tablets and remains accessible through its web app on your computer. However, logging in to your account can be a ...