By School Mathematics Project
By Fletcher, T J
By Hanson, Norwood Russell
By Association of Teachers of Mathematics
By Griffiths
By Wallace, Michael J.
By Morgan, John, Rinvolucri, Mario
By Heath, Shirley Brice
By Carré, Clive, Barlex, David, David Barlex, Clive Carre
By Kempa, Richard
By Coe, Norman, Rycroft, Robin, Ernest, Pauline
By Smith, Frank
By Rivers, Wilga M.
By Pamela Rogerson, pamela-rogerson-judy-b-gilbert, Rogerson, Pamela
By Angela Hildyard
By Penny Ur
By Solomon, Nicky
By Osborne, J., Freeman, J.
By Taylor
By Nigel P. O. Green, G. Wilfred Stout, Dennis J. Taylor
By Chapman, Jenny L., Reiss, Michael
By Ur, Penny
By Glendinning, Eric H., Holmstrvm, Beverly
By Hertz-Lazarowitz, Rachel, Miller, Norman
By Sinclair, Barbara
By SMP