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Examining the influence of van Hiele theory-based instructional activities on elementary preservice teachers’ geometry knowledge for teaching 2-D shapes

Teacher EducationMathematics EducationGeometry2-D ShapesElementary Education CurriculumDesignEducationGeometry KnowledgeTeacher DevelopmentTeacher PreparationElementary Preservice TeachersInstructional ModelsElementary Education InstructionTeaching MethodElementary EducationMathematics Teacher EducationElementary Education Mathematics Education