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Ohtani, Minoru, Watson, Anne. (2015). Task design in mathematics education :an ICMI study 22 . Cham, Switzerland: Springer Cham.

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Ohtani, Minoru, Watson, Anne. Task design in mathematics education :an ICMI study 22. Cham, Switzerland: Springer Cham, 2015. Text.

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Ohtani, Minoru, Watson, Anne. Task design in mathematics education :an ICMI study 22. Cham, Switzerland: Springer Cham, 2015. Text.

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Ohtani, Minoru, Watson, Anne. Task design in mathematics education :an ICMI study 22. Cham, Switzerland: Springer Cham, 2015. Print.