Interactive E-book teaching materials can be considered an example of instructional materials used in 21st-century learning. This study aims to develop interactive E-book teaching materials based on Canva with the RADEC model and determine the feasibility level of these interactive E-book teaching materials using the RADEC instructional model. This research follows the ADDIE model for research and development. The results of expert validation in media received a score of 93%, the expert validation in content received a score of 86%, and the expert validation in language obtained a score of 86%. The validation results from media, content, and language experts indicate that the Canva-based interactive E-book teaching materials with the RADEC model are highly suitable for learning. Furthermore, students expressed that the Canva-based interactive E-book teaching materials with the RADEC model are engaging. This is evident from the survey results, where student responses received a score of 100%. According to the Fourth-grade teacher SD Negeri 3 Linggasari, the Canva-based interactive E-book teaching materials with the RADEC model are appealing for use in teaching. This observation is supported by the survey responses from teachers, which received a score of 87%. Based on these findings, it can be concluded that the Canva-based interactive E-book teaching materials with the RADEC model are highly valid and suitable for use in education.