The list would need the following Objects:
+User Base
...+User Register
.......School Year
.......Grade Level
...User School Defined Fields

The list would also need the following Global Filters:
Where Grade Level.Grade Level Description is any of Grade 5,Grade 6,Grade 7,Grade 8,Grade 9,Grade 10
And Current Year.School Year is True

There is a SKY list that can be utilized show the custom fields if users are not adding more filters or output columns.
  1. Go to Core > Users > Users list
  2. Click 'Choose Columns' to select what information you would like to include. Custom Fields are listed near the end of available options