All students in grades 3 - 5 have access to the core Google Apps suite of applications for school use.
Log in at www.gmail.com
Your username is your first initial of your first name and your last name, followed by your two-digit year of graduation @ps25bx.org. For example, John Smith in the 5th grade would have an email address of firstname.lastname@example.org. You can ask any teacher for your email address.
See your teacher for your default password. You will be required to change it once you sign in.