By Scottish Mathematics Group
By Dixon, Charles, Scottish Mathematics Group
By Hodge, S.E., Seed, Margaret L., Scottish Mathematics Group, Brown, Margaret
By BURKHARDT
By Surendra S.P. Raghunandan
By Derek McMonagle
By Hewitt, Sally
By Neale, Sue
By Owen, Annie
By Vorderman, Carol
By Jo Boaler
By Hollands, Roy Derrick
By Thyer, Dennis
By Orton, A., Frobisher, L. J.
By Anghileri, Julia
By Orton, Anthony, Orton, Anthon
By DeGroot, Morris H., Schervish, Mark J.
By Norton, F.G.J.