Dr. Lisa Marie Portugal. “Framework for Understanding Lagging Student Test Scores in U.S. - Rationale and Strategies for Change and Improvement”. Global Journal of Management and Business Research 19, no. G3 (July 15, 2019): 35–38. Accessed April 28, 2024. https://journalofbusiness.org/index.php/GJMBR/article/view/2846.