By SPMG, Scottish Primary Maths Group
By P Corbett & C Buckto
By McNab, Rosi
By School Mathematics Project
By Doff, Adrian
By Cholij, Mark, Mark Cholij
By Christopher Paolini, Paolini, Christopher
By Bougard, Marie-Therese, Bourdais, Danièle
By Larkin, Philip
By Pam Wedgwood
By Mason, James
By Purkis, Sallie, Mason, James, Sallie Purkis, James Mason
By Kearsley Bullen, Rob, Edmondson, Andrew, Ward, Tony
By Waddell, Martin, Body, Wendy
By Cooney, Caroline B.
By Ridout, Ronald, Adamson, George
By Ridout, Ronald
By Merttens, Ruth, Ruth Merttens, Dave Kirkby
By Merttens, Ruth, Ruth Merttens
By Richardson, Carol, Kurta, Jon
By N.E.Thing Enterprises
By Wright, Walter D.