The Inquiry Activities the newly developed Korean High Schol Biology Textbooks were evaluated using SIEI(Seientific Inquiry Evaluation Inventory). The textbook evaluated are five Introductory Biology books and five Advanced Biology books developed in 1990. The instrument, SIEI, was developed by Myung Hur in his doctoral study at Columbia University in 1984. The major findings of the study are summarized below. 1. The inquiry activities in the textbooks are focusing on the low level science process skills 2. Students are rarely asked to formulate a hypothesis or to design an experiment. 3. The structure of the Inguiry Activities are mostly competitive, thus inhibiting the inquiry achievement of students. 4. The Inquiry Indices of the textbooks are between 14 and 16, meaning only 14 to 16 percent of the total instructional time are to be devoted to inquiry activities.