There were two purposes of this study. The first was that of determining, through an analysis of Texas and Thai biology textbooks, which objectives -- cognitive, affective, manual skill, processes of scientific inquiry, and orientation—were emphasized in three major and twenty-seven minor fields of biology. The second purpose was to determine if significant differences exist in the frequency distribution of these objectives. Only one biology program is used in schools throughout Thailand. This program, which was published by the Ministry of Education, consists of four textbooks with 1977 copyright date. The five Texas textbooks used in this study were those adopted under the provisions of the Textbook Law. The contents of each of the six texts included in the study were classified by using the criteria of Klopfer's Table of Specifications for Science Education.