By Wyatt
By Richard Wollheim
By David Taylor, Barbara Benson, Charles Cuff, Pauline Elkin
By Annie O. Warburton
By Louise Hashemi, Barbara Thomas
By Clive Seale (Goldsmiths, University of London)
By John Bowker
By University of Cambridge Local Examinations Syndicate
By Rosemary Hayes
By Mary Jones, Richard Harwood, Ian Lodge, David Sang
By Martin Hollis
By Rosalind Kerven
By School Mathematics Project
By T. R. Gourvish (London School of Economics and Political Science), R. G. Wilson (University of East Anglia), Fiona Wood
By Jean Ellenby
By John B. Shoven (Stanford University, California), John Whalley (University of Western Ontario)
By Martin Hewings, Michael McCarthy
By Barbara Benson
By Jonathan Clough (Monash University, Victoria)
By David Robinson (Michigan State University)
By Jon M. Conrad, Colin Whitcomb Clark
By Ghislaine Vautier
By Iris Howden
By Roy Bennett
By Anita Straker (National Numeracy Project)
By A. Hamilton Thompson