By Euripides, Harrison, John
By School Mathematics Project
By Jones, Geoff., Mary Jones, Phillip Marchington and David Acaster., Geoffrey, Mary, Marchington, Phillip, Acaster, David, Phillip Marchington and David Acaster. Jones
By Robert Glen
By Wayne, Elizabeth, Everington, Judith, Kadodwala, Dillip, Nesbitt, Eleanor
By McNab, Rosi
By Chandler, Malcolm, Wright, Mr John
By Clarke, Peter
By Seely, Mr John
By Bradfield, Philip, Potter, Steve
By SPMG, Scottish Primary Maths Group
By Seely, John, Durant, Richard, Green, Frank
By Pearson Education Ltd.
By Yayock, J., Lombin, G., Owonubi, J. J.
By Laogun, E
By Middlemas, Keith
By Ridout, C.J.
By Hunt, Rod, Brychta, Alex