http://s.troveread.com/perpos/0.2.11/5/widgets/rrwv1/img/logo.pngBy Valerie Strauss. Here’s an open letter written by academics and school activists from around the world to Andreas Schleicher, director of the Program of International Student Assessment, known as PISA, which tests 15-year-olds in dozens of countries and individual education systems in math, reading and science every three years.  The letter expresses concerns about the impact PISA is having on education systems around the world and asks him “to consider skipping” the next exams and come up with an improved assessment. Read more...