The purpose of the study was to provide for the improvement of instruction in the secondary schools of Saudi Arabia. To fulfill this goal, the study was designed to accomplish three tasks: 1) describe the nature, scope and effectiveness of the current system of teacher evaluation; 2) determine the attitude of the Saudi educators toward the existing system; 3) develop a new system and propose it for evaluating secondary school teachers in Saudi Arabia. Literature relating to the model of evaluation, criteria used in evaluating teachers, role of personnel involved in teacher evaluation, and processes and instruments used in evaluating teachers was reviewed.Letters to some of the Saudi educational authorities were sent in order to obtain information about the present system of teacher evaluation, and to acquire any studies that have been conducted in the area of teacher evaluation. A questionnaire was sent to Saudi administrators and teachers now studying at American universities. The purpose of the questionnaire was to obtain information relating to the procedure used in evaluating secondary school teachers in Saudi Arabia, to elicit their judgments of the effectiveness of the present system, and to obtain their recommendations for developing the present system of teacher evaluation.Most of the literature that was received from Saudi Arabia indicated a negative reaction toward the present teacher evaluation system. Also the answers and comments of most of the respondents to the questionnaire statements revealed a general dissatisfaction with the present evaluation system.The proposed design was based upon the review of literature, interviews with American school personnel, suggestions from respondents to the questionnaire, participation in part of the activities of the staff development program at Ball State University, consultation with some experts in the field of teacher evaluation, review of some evaluation instruments used in evaluating teachers at different school systems in Indiana, and the review of most of the material now used for evaluating secondary school teachers in Saudi Arabia.The evaluation model described the expected role of the supervisor, the building principal, the department chairman, the peer teachers, the students, and the teacher being evaluated in teacher evaluation. Also the model defined the criteria which should be used in the teacher evaluation program.The suggested procedure for evaluation was illustrated under the listed activites:1. An introductory conference. The main purpose of this conference, which is managed by the supervisor, is to explain the general outline and the procedure evaluation process.2. Departmental meetings. The chairman of the department is in charge of running these meetings. The common technique of conducting a departmental meeting in general and the technique followed at the first departmental meeting in specific are clarified.3. Field work or the cycle of evaluation. This section is concerned with the procedure to be followed in the teacher evaluation. The procedure of evaluation includes the following activities:a) Setting goals and objectives. The teacher with the help of the department chairman writes the behavioral or instructional objectives of the course in general and of each unit in specific.b) Data collection. The data about the teacher being evaluated is collected from various sources and by different techniques such as classroom observation, teacher self-evaluation and student and peer questionnaires.c) Analysis of data. The department chairman and the teacher analyze the information collected by classroom observation and questionnaires.The purpose of the data analysis was defined. After the data analysis the department chairman writes the evaluation report.The evaluation of the department chairman and the end-of-the year evaluation were included in the model. Recommendations related to the application of the model and to the betterment of the teaching-learning process were formulated.