By Bernd Bruegge, Allen Dutoit
By david-waugh, David Waugh
By Wiegand, Patrick
By David Smart
By Scottish Secondary Mathematics Group, .
By Howat, Robin, Meikle, Graham, Mullan, Edward, Murray, Ruth, Nisbet, Ken, Brown, Harvey Douglas, Mullan, Edward
By Ian Cassells, Mary Kay
By Brown, Harvey Douglas, Howat, Robin, Meikle, Graham, Mullan, Edward, Nisbet, Ken, Brown, Martin, Mullan, Edward
By Goodman, Sam, Sam Goodman
By Philip Barratt
By Gilbert, Mike
By Hanrahan, Val
By School Mathematics Project
By John Guillebaud (University College London, UK)
By Thomas Hardy, Hardy, Thomas, Seymour, Claire, Carabine, Dr Keith
By Francoise van Dorp, Chantal Simon
By Guinness, Paul, Nagle, Garrett
By Gary Cambers, Steve Sibley, Cambers, Gary, Sibley, Steve
By Ross, Simon, Simon Ross
By Pallister, Mr John, Bowen, Ms Ann
By Elaine Weinmann, Peter Lourekas
By Dawn Johnston
By McKane, Anna
By Simpkins, J., Williams, J.I., J. Simpkins, J.I. Williams
By Colin Stewart, Marc Lavelle, Adam Kowaltzke
By Ken Hyland (The University of Hong Kong)
By William J. Higginson
By Brownjohn, Sandy
By Paul Hendon