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Continue to ChatAn Investigation of Pre-service Middle School Mathematics Teachers' Ability to Conduct Valid Proofs, Methods Used, and Reasons for Invalid Arguments - https://avesis.hacettepe.edu.tr/yayin/e93c4848-210d-4465-b65b-1e69d3e5af0b/an-investigation-of-pre-service-middle-school-mathematics-teachers-ability-to-conduct-valid-proofs-methods-used-and-reasons-for-invalid-arguments