Review finds extensive grade inaccuracies at charter school by Eleanor Yang Su and Maureen Magee The academic reputation of the nationally recognized charter school at the University of California San Diego is being called into question by a new audit showing widespread grade tampering and instances where students received credit for courses they never took. About 420 grades at the Preuss School have been inaccurately recorded in the past six years. The San Diego Union Tribune , 12/12/2007