They are the nearly invisible clues left behind that can tip off experts about possible cheating on standardized tests: the little erasure marks of an answer changed from wrong to right, reports NJ Spotlight. And sadly, it’s mostly the adults who are the culprits. Now the prevalence of such erasures is getting 34 New Jersey public schools a letter from the state indicating that it wants another look at their exams and procedures. The move comes as test security is getting ever more attention nationwide, in the wake of high-profile cheating scandals in Dallas and, more recently, Atlanta…

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