Your credentials for Google are the same as your email login.

Go to www.google.com

Find the Sign in icon at the top right of the screen.

If you have signed in before, a welcome screen will pop up with your name.  If this is not you, click on the drop down arrow button to choose another account.  

Make sure you are using your CASD Google account in order to access Google Classroom and Google Forms.

Type in your entire email address as your username and the same password as your email to gain access.