The projects featured on ScienceTutorials.net apply findings from education research and cognitive science to create interactive online learning materials for introductory science courses. Rather than presenting content passively, these materials engage students actively through real-world problems, immediate feedback, and guided reflection on their own thinking. Scaffolding is tailored to each student’s needs, providing more support to those who struggle while allowing confident learners to move at their own pace — much like working with a personal tutor. Every project is grounded in research on how students learn, and its effectiveness is validated through systematic study.