PURCELLVILLE, Va., /Christian Newswire/ -- Today, HSLDA released a new study: the Progress Report 2009: Homeschool Academic Achievement and Demographics, conducted by Dr. Brian Ray of the National Home Education Research Institute, which surveyed 11,739 homeschooled students for the 2007-08 academic school year. The results were consistent with previous studies on homeschool academic achievement and showed that homeschoolers, on average, scored 37 percentile points above public school students on standardized achievement tests.