By Karavis Sylvia and Matthews Gill
By Sylvia Karavis, Gill Matthews
By Scottish Primary Mathematics Group
By Scottish Primary Maths Group SPMG
By Griffiths, Broadben
By Tony McCabe, Jacquie Thwaites
By Harrison, Mark
By Granger, Colin, Plumb, John
By Keith Windsor, Windsor, Keith
By Maria Fleming
By Jess Stockham
By Peter D. Riley, Riley, Peter, Burrows, Ray and Corinne, Jones, Linda, Scott, Sally
By Louise Carruthers, Carruthers, Louise, Diggory, Nick
By Brenda Whittle, Heidi Jayne
By Karen Mawer
By Wendy Jolliffe, Kathleen Taylor, David Waugh, Jolliffe, Wendy, Taylor, Kathleen, Waugh, David
By Joyce Lindsay, Deirdre Grogan, Lindsay, Joyce, Grogan, Deirdre
By Paul Noble, Jean Noble
By Allison Bond
By School Mathematics Project
By Carol K. Sigelman, Elizabeth Rider
By Colin Bamford, Keith Brunskill, Gordon Cain, Sue Grant, Stephen Munday, Stephen Walton
By Cynthia Rider
By Aukerman, Robert C.