Figure 3. Comparison of class performance. Identical questions were asked during the respective clicker sessions in 2013 and 2014

From

Implementation of a Technology-supported Three-stage Classroom Feedback System for Promotion of Self-regulation and Assessment of Student and Teacher Performance

Volker Patzel

American Journal of Educational Research. 2015, 3(4), 446-449 doi:10.12691/education-3-4-9