Freer Weiss, D.M. (2005). Keeping it real: The rationale for using manipulatives in the middle grades. Mathematics Teaching in the Middle School, 11(5), 238-242. https://doi.org/10.5951/MTMS.11.5.0238
Hill, K. K., Bicer, A., & Capraro, M. M. (2016). Do teachers have the opportunities they need to learn to teach with manipulatives? Electronic International Journal of Education, Arts, and Science, 2.
McNeil, N., & Jarvin, L. (2009) When theories don’t add up: Disentangling the manipulatives debate. Theory into Practice, 46(4), 309-316. https://doi.org/10.1080/00405840701593899
Moyer, P. S. (2001). Are we having fun yet? How teachers use manipulatives to teach mathematics. Educational Studies in mathematics, 47(2), 175-197.
Moyer-Packenham, P. S., Salkind, G. W., Bolyard, J., & Suh, J. M. (2013). Effective choices and practices: Knowledgeable and experienced teachers’ uses of manipulatives to teach mathematics. Online Journal of Education Research, 2(2), 18-33.
Tooke, D., & Hyatt, B. (1992). Why aren’t manipulatives used in every middle school mathematics classroom? Middle School Journal, 24(2), 61- 62. https://doi.org/10.1080/00940771.1992.11495172