By Brown, Doug, Robertson, A.G., Howat, Robin D., Mullan, Edward C. K., Nisbet, Ken
By Harrison, Paul
By Allan, Ray, Williams, Martin T., Martin
By Broadbent, Paul
By D.A. Holland, C. G. Brown, Holland, D.A., Brown, C. G.
By DeGroot, Morris, Schervish, Mark
By Montague-Smith, Ann
By Letts KS2
By Jenkins, Gerald, Wild, Anne, Bear, Magoalen
By Kirkby, David
By Bryant-Mole
By Leake, Diyan
By Mills, Steve, Koll, Hilary, Adrian Lloyd Thomas, Dr
By Gold Stars
By LETTS EDUCATIONAL
By Tyler, Ken, BURKHARDT, Hugh
By editor
By Frood, Kate
By Scottish Primary Mathematics Group
By Scottish Primary Mathematics Group, Matthews, Bethan, etc.
By Frobisher, Len
By Fan, Professor Lianghuo
By Huggins-Cooper, Lynn
By SPMG, Scottish Primary Maths Group