The main aim of this study is to evaluate opinions of high school physics teachers on instructional activities and the content of physics textbooks. Data were gathered using a questionnaire containing multiple-choice and open-ended questions. The questionnaire was developed by the researchers and the reliability and validity of questionnaire were provided. During the preparation of the questionnaire the opinions of 20 experienced high school physics teachers working in different cities were taken. The opinion of an expert in physics education was taken for the validity of the questionnaire. For the reliability of the questionnaire meetings were arranged with 25 teachers in the study and it was observed that the reliability of the questionnaire was high.