Shoraka, Mohammad, Robert Arnold, Eun Sook Kim, Geri Salinitri, and Jeffrey Kromrey. 2016. “Parental Characteristics and the Achievement Gap in Mathematics: Hierarchical Linear Modeling Analysis of Longitudinal Study of American Youth (LSAY)”. Alberta Journal of Educational Research 61 (3):280-93. https://doi.org/10.11575/ajer.v61i3.56065.