To send student email please use this format for the email address:
student.name Birth Month and email@example.com
You can go here to sign in to gmail:
If you have gmail account(s) they will show up here. If the student account isn't there you will choose "sign in with a different account". A form will ask you for your email address then your password.
If you do not have a gmail account you will choose "create account". A form will ask you for the email address then your password.