By David Smith
By Armadillo Books
By John D. Collins, etc.
By Clarke, Peter, Rossiter, Christina
By School Mathematics Project
By Brian Nash, Paul Nightingale, Jan Wade
By Mr David Alcorn, Mr Tony Banks
By Broadbent, Paul, Kearsley Bullen, Rob
By Appleton et al
By June Haighton, Anne Haworth, Steve Lomax, Andrew Manning, Kathryn Scott
By Scottish Mathematics Group
By Colin Hynson
By Catherine Casey, Graham Fletcher, Lesley Fletcher
By CGP Books
By Richard Dawson
By Huggins-Cooper, Lynn, Broadbent, Paul, Head, Alison
By Kirkby, David
By Alan Brighouse, D. Godber, Peter Patilla, Brighouse, Alan, Godber, D., Patilla, Peter
By Griffiths, Rose
By Mullan, Edward C. K.
By Scottish Primary Maths Group
By Dunne, Richard, Carrie