By Wyn Brice, Tony Timbrell, Linda Mason
By Ed Southall
By Marilyn Nickson
By Ladybird, HY Murdock, Lynn N. Grundy
By CGP Books
By Mitchell, Sandra, Golabek, Charles, Walsh, Ed, Sandra Mitchell, Charles Golabek, Ed Walsh
By School Mathematics Project
By Frances Down, Alison Primrose, Bond 11+
By Hilary Koll, Steve Mills
By Goal
By Gareth Cole, Joe Petran, Linda Mason Keith Pledger
By Neil Griffiths
By Su Nicholson, Russell Timmins, Greg Byrd
By Clare Plass
By Clemson, David, Bond 11+
By Michael White
By David Rayner, Michael White
By Alison Primrose
By Jo Chambers
By Jo Chambers, Paul Broadbent
By CGP Books, CGP Books
By David Baker, etc., Jim Griffith, Paul Hogan, Chris Humble
By Somerset County Council