By School Mathematics Project
By Vickers, K. M., Tipler, M. J., Van Hiele, H.L.
By Harrison, Paul
By Briten, Paul
By Holderness, Jean
By Banks, Mr Tony, Alcorn
By Alcorn, David
By K.A. Hesse, Hesse, K.A.
By Hesse, K.A.
By Blinko, Janine, Graham, Noel, Janine Blinko, Noel Graham
By Harris, Mary, Hoyles, Celia
By Alan Brighouse, D. Godber, Peter Patilla, Brighouse, Alan, Godber, D., Patilla, Peter
By diana-boynova, Berry, Catherine, Goldie, Sophie, Stripp, Charlie, Boynova, Diana, Lissaman, Richard
By Willis, Sue
By Bill Domoney, Paul Harrison, Liz Ransford, Christine Symonds, Domoney, Bill, Harrison, Paul, Ransford, Liz, Symonds, Christine
By Dean, Peter G.
By Keith Pledger
By Vorderman, Carol
By K. M. Vickers, M. J. Tipler, Henriette Geldof