Categorization reliability of preservice elementary teachers' use of mental computation addition strategies on natural numbers using a written questionnaire
Résumé
Teacher students' use of mental computation strategies in addition on two-digit natural numbers is analyzed using a written test. To test the reliability of the categorization of the students' explanations as mental computation strategies the categorization is done by three persons and their categorizations are then compared. The test result show that the categorizations are to a large degree in agreement, strengthening the reliability of the method.
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