Google Classroom Access

I have created a Google Classroom to upload upcoming lessons. For access to our classes Google Classroom, first students must log in using their district username with @scuc.txed.net and their district password. The configuration for student username and passwords is as follows: 

1st 13 characters of last name with no special characters 1st 2 letters of first name and last 3 numbers of their student id. The password is 1st 2 letters of first name and entire student id with leading zero. See example below.

Linda Coolbaugh 012345

Username: coolbaughli345   password li012345

Then enter the classroom code: fes2nze