The quality of Calculus learning in higher education remains a challenge, as instructional practices tend to be predominantly procedure-oriented, thereby limiting opportunities for meaningful learning interactions and for concept visualization that supports conceptual understanding. This study aims to examine content validity and learning effectiveness in Calculus instruction through TPACK-integrated e-learning. The research employed a Research and Development (R&D) approach using the ADDIE model (Analyze, Design, Develop, Implement, and Evaluate. The developed instrument consisted of 20 items encompassing interactivity aspects across three dimensions and accessibility aspects based on four principles. Content validation was conducted by three experts using Aiken’s V index. The results indicated that all instrument items were content-valid and were categorized as relevant to highly relevant. Furthermore, the effectiveness test results showed that the proportion of students achieving classical mastery exceeded the established threshold, and students’ learning improvement fell into the high category. Additionally, the effect size analysis shows that implementing TPACK-integrated e-learning has a very strong impact on students’ understanding. These findings confirm that TPACK-integrated e-learning is not only valid and effective but also has a substantial impact on enhancing the quality of Calculus learning in higher education.
Syahri et al. (Fri,) studied this question.