Medical imaging education is a key training component in BME programs. Medical imaging curriculum involves physics principles, mathematical derivations, engineering implementations for teaching image generation, reconstruction and application. We developed an Internet accessible, multi-level module-based interactive system for teaching five commonly used medical imaging modalities. Each imaging modality is delivered by five to six teaching modules (topics). Teaching or learning proceeds on the module basis. The system is integrated by the open source MySQL database software that manages updating teaching materials and also tracks student's learning gain through different assessments. Instructor gets instant feedback on the topic delivered through his/her lecture when students work on the system. We have applied this teaching/tracking system in small size classes. The result shows significant learning gains in our applications. We plan to complete all teaching modules and apply to other local institutions for biomedical or other engineering students.