The Effectiveness of Project Based Learning with Performance Assessment on Mathematical Reasoning Ability in View of Self Confidence Students at SMA Negeri 7 Semarang. JM [Internet]. 2023 Apr. 30 [cited 2026 Jun. 30];7(2). Available from: https://ejurnal.mercubuana-yogya.ac.id/index.php/mercumatika/article/view/3267