In 2005, Brazilian Biology high school textbooks were evaluated as part of the National Program for the High School Textbook (PNLEM). In this paper, we report results of this evaluation. The evaluation criteria and processes are presented in a detailed manner, as well as the main flaws found in the textbooks not recommended to be bought by the Ministry of Education and the main positive aspects of the approved materials. Nine out of 18 textbooks satisfied the minimum quality criteria for approval. Seven excluded textbooks showed problems in all classes of evaluation criteria. All nine excluded textbooks exhibited problems related to conceptual correctness and adequacy, and accuracy of basic information. The most frequent qualities of approved textbooks concerned aspects of methodological adequacy and knowledge construction. We found no clear evidence that the frequency of choice of the approved textbooks by the high school teachers reflected the quality of the evaluated items, as established by the team which evaluated the textbooks.
Textbooks; Biology Teaching; High School; PNLEM
