By Marion Cranmer, Catherine Musto, Catherine Mutso
By School Mathematics Project
By Burn, Bob
By Andrew Brodie
By D.C. Perkins, E.J. Perkins
By Askew, Mike, Ebbutt, Sheila, Williams, Helen, Latham, Penny
By Ann Montague-Smith, Garry Davies, Theresa Tibbetts
By John Countryman (Lincoln School, Rhode Island, USA)
By Ann Montague-Smith, Margaret Gronow, Louise Gardner
By Julia Anghileri
By Bob Fox, Ann Montague-Smith, Sarah Wilkes
By Lynn Huggins-Cooper
By Patricia C. Kenschaft
By John Davis, Margaret Gronow, Mick Davies
By Joan Nield, Lesley Fletcher, Garry Davies
By Ruth Merttens, Ba, Med, Dave Kirkby
By Clarke, Peter
By Scottish Primary Mathematics Group
By SSMG
By Scottish Primary Maths Group SPMG
By Broadbent, Paul, Church, K., Chur
By Andrew Baines, Bond 11+
By David Turner, I A Potts, B V Hony, W R J Waite
By Orr-Love, Michael