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Measuring striving for understanding and learning value of geometry: a validity study (13 h 53 m, 25 jun 2017 año – 11 h 22 m, 1 mar 2018 año)

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14 dic 2017

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459

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13 h 53 m, 25 jun 2017 año

11 h 22 m, 1 mar 2018 año

~ 8 months

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