If you are being automatically signed in to your account with your gmail, you may have enabled a password-storing feature in your browser or the Google option to "Stay signed in." You will need to disable that sign-in if you wish to log in with an Education.com email address and password.
Here are instructions to disable the automatic sign-in:
--If you are unable to sign in to your Education.com account, visit this link:
--If you are already signed in to your Education.com account, simply click on your user ID in the top right corner, then choose Account Settings, then scroll down to the Settings section, and choose "Disconnect from Google" or "Disconnect from Facebook."