By Lexus
By Goodrich, Philippa, Stanley, Carol
By Scottish Primary Mathematics Group
By Askew, Mike, Ebbutt, Sheila, Williams, Helen, Latham, Penny
By Kahiga, Samuel
By McArthur, Tom
By Hughes, R.O.
By Douglas Coombes, Geoffrey Marshall-Taylor
By Hinton, S. E.
By Austen, Jane, Strange, Derek
By Anon
By Garnier, Mike, Picard, Jeanine
By McCormick, Robert, Murphy, Patricia, Harrison, Michael
By Fournier, Isabelle
By Baumber, John, Mobbs, David, Rhodes, Brian, Tresadern
By Goodrich, Frances, Hackett, Albert, Frank, Anne
By Omer-Cooper, J.D., etc., Afigbo, A.E.
By Boyle, Trudy, Ray, Rita
By Scottish Primary Mathematics Group, Matthews, Bethan, etc.
By Ngugi wa Thiong'o