There are four things that need to happen in order to link classes.
1. The courses must be the same first 5 digit course code from eSchool.
2. The class rosters must be unique (the same student can't be in all sections)
3. The marking periods must be the same.
4.  The teacher admins must be the same.

This link also has a great demonstration of what teachers will SEE during this process. Click LINKING EXISTING SECTIONS TOGETHER.

We've noticed that if students have changed sections, they might still be in the original course in Schoology. This will prevent the courses from linking. If this happens teachers will need to check their rosters and manually unenroll the student from the course they should not be in. Then they should be able to link the courses.

If you attempt to link, and the courses are grayed out, you can hover your mouse over the course and see what is causing the linking issue.