This study aimed to describe ability of mathematical problem solving and
responsibility of students at MTsN 4 Kebumen in terms of learning achievement.
This study used qualitative research using the Miles and Huberman model
including data reduction, data presentation and conclusion. The subjects in this
study were students of class VIII D. They were grouped into 3 based on learning
achievement, namely students' groups of high, medium and low learning
achievement. Three respondents were selected from each group using purposive
sampling technique. Based on the results of the study, it can be concluded that 1).
Students in high groups have been able to apply all existing problem solving steps
and high responsibilities. 2) Students in the middle group have been able to
implement steps to understand the problem, develop problem-solving strategies
and implement problem-solving strategies with high responsibilities. 3) Students
in the low group were only able to implement steps to understand problem and
formulate a problem solving strategy with the responsibility; their ability and
responsibility were still low.