Understanding recursion remains one of the most challenging topics forintroductory programming students. This paper presents a series of interactiveeducational materials designed to bridge the gap between abstract recursive calls andthe underlying stack mechanism in C/C++. By using visual metaphors and step-by-stepexecution flows, the proposed tools aim to reduce the cognitive load on high schoolstudents. The interactive course covers fundamental analogies, call stack simulations,mathematical functions, iterative versus recursive paradigms, array processing, and selfassessmenttechniques. Preliminary results from classroom implementation show asignificant improvement in student engagement and code-tracing accuracy. Thematerials are hosted on a dedicated web platform for open-access educational use.