Saleh, Mohammad and Lazonder, Ard W. and Jong, Ton de (2007) Structuring collaboration in mixed-ability groups to promote verbal interaction, learning, and motivation of average-ability students. Contemporary Educational Psychology, 32 (3). pp. 314-331. ISSN 0361-476X
Saleh, Mohammad and Lazonder, Ard W. and Jong, Ton de (2005) Effects of within-class ability grouping on social interaction, achievement and motivation. Instructional Science, 33 (2). pp. 105-119. ISSN 0020-4277
Saleh, Mohammad Ahmad (2005) Optimizing grouping practices in elementary classrooms. thesis.