This is the Grades Report we have been using for our downs list.  I have updated it to 7.x and it should work on other servers (removed our localization's).  This report generates a list of students on the screen.  It does not create an export file you can download.  We use custom pages in PowerSchool System Administrator so I have dropped the file in the reports folder under the admin folder.  You can ether give that link to your principals/counselors or edit your reports list to include it.

Click here to download the file.  (You will need to right-click and do a "Save link as" and rename it to gradesreport.html)