To log into Classlink:

https://launchpad.classlink.com/


Username is their ID number
Password: nse##### (ID number)

Then you will see a Google Classroom APP, click on that.  If not go to

classroom.google.com

then

If you are asked to enter their gapps account:
Username: #####(ID number)@gapps.northschuylkill.net
Password: nse#####(ID number)