Clarke, Barbara, and Faragher, Rhonda (2004) Possibilities not limitations: teaching special needs children. In: Clarke, Barbara, Clarke, Doug M., Emanuelsson, Göran, Johansson, Bengt, Lambdin, Diana V., Lester, Frank K., Wallby, Anders, and Wallby, Karin, (eds.) International Perspectives on Learning and Teaching Mathematics. National Center for Mathematics Education, pp. 379-394.