Kartono, U.K. Muttaqi, N.K. Dwidayati
This research aimed to find out effectiveness of Osborn Simple Feedback learning model implementation in solving mathematics problem and to analyse the error types of the students. This mix method research combined two approaches, by having sequential explanatory design (based on quantitative - qualitative orders). The population consisted of VIII graders of MTs Al - Ma'arif Rakit in academic year 2018/2019. The quantitative research side, the sample was collected through random sampling and it was gained two classes with significantly different initial problem solving. The quantitative data analysis was based on one sample t test, proportional test, and average variances of two independent sample test. The qualitative aspect of this study was done by taking the subjects based on purposive sampling. 6 students of experimental group were chosen based on their problem solving skill started from high, moderate, and poor categories. Based on qualitative analysis, it could be concluded that problem solving skill of the students was varied. It depended on the error types. The findings also showed that the implementation of Osborn Simple Feedback model was effective to problem solving skill of the students. The mathematics problem solving skill of the students on each category and research subject was varied. © Published under licence by IOP Publishing Ltd.
Mathematics Department, Faculty of Mathematics and Natural Science of Universitas Negeri Semarang, Indonesia
