By Staneff, Tony
By Weltman, Anna
By Hayman, Margaret
By Merttens, Ruth, Kirkby, Mr Dave
By Vorderman, Carol
By Knapp, Brian
By Clissold, Caroline
By Kearsley Bullen, Rob, Lawlor, Graham
By Goldie, Sophie
By CGP Books, CGP Books
By McArdle, Sean
By Miller, Jim, Newman, G.
By Foster, Leslie
By Gold Stars
By David Baker, Paul Hogan, Chris Humble, Barbara Job, Baker, David, Hogan, Paul, Humble, Chris, Job, Barbara
By Pearson
By Bolter, Julie, Byrd, Mr Greg, Edmondson, Andrew
By Holt, Michael, Evans
By Brown, Doug, Hunter, Jim, Hodge, J. L., Robertson, A.G., Howat, Robin D., Mullan, Edward C. K., Nisbet, Ken
By School Mathematics Project
By Brown, Doug, Howat, Robin D, Murra, G, Mullan, Edward C K, Murray, R, Nisbet, Ken, Thomson, J
By Scottish Mathematics Group
By School Mathematics Project, Ridley, Trevor