By Jennings, Sue, Dunne, Richard
By CGP Books
By Kirkby, Mr Dave, McClure, Lynne, Roe, Catherine, Stanbridge, Bev
By Derek Farmer
By Rev. Wilbert Vere Awdry
By Roger McGough, Dee Reid, Nicholas Tucker, Debi Gliori
By David Pace
By Kevin Houston (University of Leeds)
By M. R. Heylings
By Ewart Smith
By R. Howat
By School Mathematics Project
By Holt, Michael
By Jenny Tyler, Graham Round
By Ann Montague-Smith
By Tracey Steffora
By Emily Guille-Marrett, Charlotte Raby, Laura Gonzales, Collins Big Cat
By J M Bond, Baines, Andrew
By Ruth Merttens, Ba, Med, Dave Kirkby
By Dr Mike Goldsmith
By Letts KS2
By Tony and Liz Fleet, Tony Fleet, Liz Fleet
By Scottish Primary Mathematics Group