Class of 2015 DeKalb County School System SAT Scores

Source: Dunwoody School Daze

The Georgia Department of Education has released the 2015 SAT Scores:

Many DCSS schools saw tremendous gains from 2014 to 2015.  While nationwide and in the State of Georgia participation in the SAT increased, the number of DCSS students taking the SAT significantly decreased.  Any ideas?