Using Chrome Web Browser will give you the best result:
Go to www.mail.google.com
Sign in with your Google account you use everyday or the account you may have received from your teacher.
Example: firstname.lastname@example.org the first time you have to type the whole thing.
When you sign in for the first time (if you have never logged in at school) the temporary password for your account is Eagles14
After you sign in you will be asked to create a new password. Please use your lunch number with your first and last initials for this new password.
If you have signed in before at school you will use your password the same as you do at school.