PEMBELAJARAN BERBASIS MASALAH UNTUK MENINGKATKAN KEMAMPUAN PENALARAN MATEMATIS SISWA SMP

Abstrak / Ringkasan

In the conventional learning of mathematics, generally learners
are not given enough opportunity to develop their reasoning ability
because of the teacher's excessive concentration on mathematical
activities which are algorithmic and mechanical while abilities in
problem-solving, critical and creative thinking, and communicating
are important for learners to possess on the face of such a global
information era as that currently going on. The problem-based
learning (or PBL, for short) carried out in the research this article is
about is one of the approaches to the learning of mathematics
facilitating learners in learning through problem-solving activities.
By means of such mathematical activities, learners are urged to
make observations, explorations, investigations, and inquiries in
solving mathematical problems. With teacher guidance, learners are
made to feel demanded to ask questions and give arguments through
a process of in-group interaction, negotiation, and reflection so that
they could formulate conjectures and conclusions.
The research this article is about employed the procedure of
collaborative classroom action research conducted through the
implementation of problem-based learning and focused on
improving the mathematical reasoning ability of junior high school
students. The research subjects were forty-six students of Grade 2B
at SMP Negeri 22 Bandung, a state junior high school. The
instruments employed in the research were tests on reasoning ability,
questionnaires, observation sheets, students' diaries/journals, and
interview pointers. The research results indicate that the learning

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