The system of the present invention provides interactive spaced education and combines the pedagogical merits of the spacing effect and the testing effect to improve a learner's ability to learn and retain conceptual items. A test item, such as a question or educational material regarding a concept, is delivered, a learner's response is recorded, and the correct answer to the test item is provided. Future delivery of additional test items is customized with regard to its content, difficulty, and time interval based on information from the learner's response(s). The electronic delivery includes a structured repetition over spaced intervals of time as well as retesting the learner with subsequent test items based on new levels of difficulty, new delivery intervals, and new content areas. The present invention, by combining spaced education with adaptive learning, improves the learner's ability to learn, recall, and retain items of information.