Providing immediate feedback to students of their level of understanding of a concept is important for effective learning and for the instructor to decide to either review the concept or move forward to another. This paper demonstrates concept mapping and a student response system to provide immediate feedback in an Electrical Circuits course. We showed how students\' learning is improved when they receive immediate online feedback about their state of learning from their peers and the instructor. The same course was taught differently in two consecutive years, one with immediate feedback and concept mapping and the other without. The assessment of the impact on students learning using immediate online feedback and concept mapping presented through the student grades for the same same course in the two years. The results showed that immediate feedback and concept mapping have a significant and positive effect on student performance.