By DeFilippo, Judy, Walker, Michael
By Grundy, Peter, Maley, Alan
By Gibson, Janet
By Mackay, Frances, Jennings, Terry
By Stanfield, Jeff
By Beatty, Carole, Neate, Roberta, Palmer, Sue
By Inglis, Jane, Neate, Roberta, Palmer, Sue
By Wright, Claire
By Tilly, Claybourne, Anna
By Odam, Professor George, etc.
By Howe, Linda
By Peter Patilla, Patilla, Peter
By Bentley, Diana
By Mayhew, James
By Kumon
By Chrisp, Peter
By Thomson, Ruth
By Leonard, M.G., M.G. Leonard
By IMPACT Project Uni Of N.London
By SPMG, Scottish Primary Maths Group
By Wren, Wendy
By Butterworth, John
By Alan Jones, Roy Purnell, Jones, Alan, Purnell, Roy
By Bennington, Kate