By Val Biro
By Monica Hughes
By David Riordan
By Shoo Rayner
By PearsonPubl Oxford Heinemann
By Unknown
By CVQO; edexcel
By Jim Eldridge
By Mcgrath, James
By David Orme, Orme, David
By Donne, John, Reeves, James
By NO AUTHOR, no-author, Various
By Peggy-Lou Martin, Martin, Peggy-Lou
By Karavis Sylvia and Matthews Gill
By Sylvia Karavis, Gill Matthews
By Nicky Winder, Baljit Nijjar, Janet Searle, Richard Acklam, Araminta Crace
By SPMG, Scottish Primary Maths Group
By Scottish Primary Mathematics Group
By Greene, Graham