Main Article Content
The study investigated the junior high school students’ learning experiences to develop their metacognitive factors; logical, critical, creativity, consistency, and self-esteem within solving mathematical equation problematics. The study introduces Problem Based-Learning (PBL) to enhance students’ metacognitive factors as characteristic building consistency to self-sustainable personal. The model signified humanized humanity feature of Khalifa pedagogic experiences in early layer, junior high school. It reformed the very concept of pedagogic metacognitive to solve problems. The study described about the students’ achievement in PBL for mathematics subject. The samples are the seventh-grade students of SMP N 1 Kota Langsa. There are 66 (sixty-six) students who participated and selected through their ability to work in individual, collective, and superiority. The study assessed the students’ achievement through validated test. The tests instruments have been validated by the proficient in educational evaluation. The test posted 0, 873 of reliable coefficient ratio. The results analyzed through statistical equations description. The result projected about the students’ problem-solving achievement features, i.e. there are 46 students who well-understand in problem-solving category and gave answer completely and correctly, there are 58 students who able to organized in problem-solving category and also gave answer completely and correctly, there are 37 students who settled in fair-understand category in problem-solving and also gave answer completely and correctly, and there are 16 students who settled in sufficient category. In conclusion, the study proved PBL effectivity for students’ learning experiences to solve problem within mathematical equation. It is suggested to be applied in science for elementary school subjects as one of teaching pedagogic model.