Type office.com into your address bar on your computer or phone.
Click Sign In on the lading page.
Login with your school email.
This will be the username you use in school with @lhs.lancs.sch.uk on the end.
For example you@lhs.lancs.sch.uk
Once you enter your email you will see the Longridge High School Office 365 login screen.
Enter the password you use on the computers in school.