A whiteboard and feedback app for use by teachers and students that employs the traffic light system for displaying level of understanding. Students display the green light when they understand, amber when they are unsure and red when they are confused. The teacher can also employ peer learning by teaming up students who show a green light with students who display amber or red lights. The whiteboard feature, also with a grid option, enables teachers to check students specific understanding via targeted questioning and give instant feedback.