Amy Reamer Reamer, A. C., Ivy, J. S., Vila-Parrish, A. R., & Young, R. E. (2015). Understanding the evolution of mathematics performance in primary education and the implications for STEM learning: A Markovian approach. COMPUTERS IN HUMAN BEHAVIOR, 47, 4–17. https://doi.org/10.1016/j.chb.2014.09.037