Hodgen, Jeremy. “THE ACHIEVEMENT GAP: THE IMPACT OF BETWEEN-CLASS ATTAINMENT GROUPING ON PUPIL ATTAINMENT AND EDUCATIONAL EQUITY OVER TIME”. Academic Journal of Psychology and Education (AJPE), vol. 14, no. 1, Jan. 2023, pp. 54-78, http://zapjournals.com/Journals/index.php/ajpe/article/view/361.