Alfie Kohn writes and speaks widely on human behavior, education, and parenting. The author of eleven books and scores of articles, he lectures at education conferences and universities as well as to parent groups and corporations.

Kohn's criticisms of competition and rewards have been widely discussed and debated, and he has been described in Time magazine as "perhaps the country's most outspoken critic of education's fixation on grades [and] test scores."

Given that most schools still send home report cards with letter or number grades, and most teachers still put these letters or numbers on students’ individual assignments, you would never guess that most studies of the effects of grades find that. . .

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