This study discusses university-level e-education on circuit theory. Automatic assessment activities were realized in the learning environment Moodle with symbolic math enhancement plugin STACK. With a comprehensive set of self-study e-assignments, the desired outcome was to help the students to improve their conceptual understanding. Here, the instructional approach is to assign take-home e-activities during the course. The rationale for such approach is to guide the student to prepare themselves for the final exam. This study compares the learning results with the previous year’s traditional paper exams. E-activities can improve learning, but a lot of attention must be paid to two issues: realizing the activities and students’ learning skills. Moreover, the structure of a circuit theory e-quiz differs from a typical mathematics quiz, which is also discussed here