Previously to the new grade book, a teacher could use the Section drop down to switch between all the course sections that they taught. The new grade book limits this to only the sections in the current School Level. This forces a teacher to go out of the grade book and then navigate to a section in the other School Level to get to the other grade books.

The grade book should add BACK the ability to switch between all the sections that a teacher teaches, regardless of what school level the sections are in.