Main Article Content
The aims of this research were to enhance mathematical habits of mind in the topic of application of linear equation with one variable for students in grade 8 by using open approach learning activities. The participants in this research were thirty-nine students of Phitsanulok Pittayakom School, Phitsanulok, in the second semester of 2018 academic year. This is qualitative research. The data collected from worksheets, mathematical habits of mind tests and interview. The results from four worksheets showed that most of the students had alternately good and fair level of mathematical habits of mind in eight aspects. As a result of the test, most students have a good level of mathematical habits in five aspects and fair level in three aspects. In addition, the results from the interview in the first aspect and the seventh aspect, were consistent with the test by students who were at a good and fair level still be the same level after interviewing. In the other hand, students were in the poor level from the test; after interviewing, it was found that the students were at the fair level.