• Math on the Playground

    by William Amato
    March 2002, Children's Press (CT)

  • Readings for mathematics: a humanistic approach

    by G. Joseph Wimbish
    1972, Wadsworth Pub. Co.

  • Primary Mathematics (SPMG)

    by Scottish Primary Mathematics Group
    1984

  • The World book of math power

    by World Book Encyclopedia
    1983

  • Mathematics

    by Scott, Foresman and Company.
    2004