This study aims to determine the effect of implementing an interactive digital book based on the RADEC (Read, Answer, Discuss, Explain, Create) learning model on learning outcomes, learning motivation, and learning implementation in procedural text material. The study used a quantitative approach with a quasi-experimental design of the nonequivalent control group design. The subjects were seventh-grade students at a public junior high school in the even semester of the 2023/2024 academic year, consisting of an experimental class and a control class. The experimental class followed learning using an interactive digital book based on RADEC, while the control class used conventional learning with printed textbooks. The research instruments included a procedural text comprehension test, a learning motivation questionnaire, and an observation sheet on learning implementation. Data were analyzed using descriptive and inferential statistics, including paired sample t-tests and independent sample t-tests. The results showed that there was a significant difference between the learning outcomes of students in the experimental and control classes. The average posttest score and gain score of the experimental class were higher than those of the control class. In addition, students' learning motivation in the experimental class experienced a more significant increase. Observation results also indicate that the implementation of learning using the RADEC model is in the very good category. Based on these results, it can be concluded that the implementation of interactive digital textbooks based on the RADEC learning model is effective in improving learning outcomes, learning motivation, and the quality of the learning process for procedural texts. Therefore, interactive digital textbooks based on RADEC are recommended as alternative teaching materials in Indonesian language learning.
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