Özet:

The purpose of this study was to test the validity, effectiveness and practicality of a process image-based science textbook for learning science in junior high schools. This study used a Research & Development (R & D) modified from 4-D by Thiagarajan (et al. 1974) which consists of Define, Design, Develop, and Dessemination. The stages of this research procedure: Define Stage, Design Stage, Development Stage (Develop) Table 4.1 shows that each component of the assessment gets almost the same score from the four validators. The mean score for content feasibility was 3.46, the mean graphical score was 3.58, the language mean was 3.38, and the mean presentation was 3.45. The mean score obtained shows that based on the validators assessment of the science textbook based on the process of the wave vibration material is very valid and suitable for use in learning in junior high school..Natural science textbooks based on images of the process of wave vibration material which are practically known are based on data from trial I and trial II. Data were collected through observation, response questionnaires, and interviews with students. The implementation of learning and user responses are indicators of practicality. The results of the learning implementation analysis showed an increase in the percentage of learning implementation at each meeting. At the first meeting, the percentage of learning implementation was 79.24%, because students were not used to analyzing the process image of the wave vibration material. At the next meeting students became accustomed to using textbooks based on the process of wave vibration material so that the percentage of learning implementation increased. Consecutively the percentage of the implementation of learning is the second meeting of 81.34%, and the third is 83.34%, and the average result of the implementation of learning is 83.18%.The effectiveness of textbooks based on images of the process of wave vibration material is known based on the increased understanding of the concept of wave vibration which is measured based on the pretest and posttest values, and is analyzed through normalized gain. The N-gain index with the criteria medium to high and classical learning completeness are indicators of effectiveness. Classical mastery of learning is achieved when 85% of students meet the specified minimum completeness criteria (KKM). Based on the results of the pretest and posttest, it was found that the N-gain value was 0.599 which was in the medium criteria, and the number of classical completeness was also complete, namely 85.71%.

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