By Gordon, Keith
By CGP Books
By Broadbent, Paul, Patilla, Peter
By Clarke, Peter
By Blair, Georgina
By Davies, Kay
By Nuffield Foundation
By Roebuck, E., Sherlock, Alan, Godfrey, M., Pickles, J.
By Hefter, Richard
By Ticktock
By Cullerne, Dr. John
By Fannon, Paul, Ward, Stephen
By Kirkby, David
By Richardson, Peter
By Frank Tapson, Tapson, Frank
By Newman, Graham, Bull, Ron
By Julius, Edward H.
By Haslam, John
By Kent County Council
By School Mathematics Project
By Ellis, Jane, Poddington, Lucy, Pumpkin House
By Gardner, Ian
By Buckwell, G.D.
By Igloo Books