This study was designed to identify and describe students' metacognitive thinking process of solving covalent bonding based on student academic ability level One hundred eight high school students in Indonesia participated in the study. Students are classified into upper, middle and lower academic groups based on field notes, student academic data, problemsolving test (TPM) score and teacher suggestions Six students consisting of two students in each group were interviewed to reveal their metacognitive thinking process. The data analysis technique used summative content analysis and tested for its validity by source triangulation. The results showed that the students' group of upper and middle academic ability are doing metacognitive thinking with dimensions of planning, monitoring, and reflection in solving covalent bonding problems, which the upper group has more varied metacognitive thinking process at monitoring and reflection dimensions. The lower group only do the planning and the monitoring dimensions. Therefore, teachers need to trace metacognitive in learning so that students are more careful in determining problem-solving strategies and obtain expected learning outcomes.
Keywords-metacognitive thinking process; covalent bonding; academic ability levelI.