Pleasant Valley School District has announced that four of its schools were recipients of the 2011 Keystone Achievement Awards. Accepting on their behalf are their principals, from left, Penny Derr, PVI; Christopher Fisher and Carole Geary, Chestnuthill Elementary; Joshua Krebs, PVE; and Joseph Kondisko, Polk Elementary. The Keystone recognizes Pennsylvania schools for academic achievement. More than 2,000 Pennsylvania schools are being honored for demonstrating sustained academic achievement over two school years. Each school earning a Keystone Achievement Award receives a large, keystone-shaped placard for display. The 2011 awards are given to public schools that achieved Adequate Yearly Progress in the 2009-10 and 2010-11 school years. AYP is determined, in part, by a school's performance on the Pennsylvania System of School Assessment, the standardized test given annually to students in grades 3-8 and 11.