A survey of American history textbooks used in Michigan schools concludes that they are "very seriously deficient" in their treatment of minority groups, particularly Negroes. This review of textbooks is mandated by the Social Studies Textbook Act passed by the legislature in 1966 which requires an annual random sampling to ascertain how fairly these books recognize the achievements and accomplishments of ethnic and racial groups. Evaluation guidelines deal with historical accuracy, realistic treatment of accomplishments and contributions of minorities, the concept of "race," and the tone of the text. Professional historians assessed 12 recent texts, all of which are criticized, although none are cited specifically. (NH)