Efektivitas Model Pembelajaran Inkuiri Terbimbing untuk Meningkatkan Kemampuan Pemecahan Masalah Matematis Siswa

This quasi-experimental research aimed to find out the effectiveness of guided inquiry learning model to increase students’ mathematical problem solving ability. The population of this research were all students of grade 7th of SMPN 1 Tanjung Bintang in the even semester of academic year of 2018/2019 as many as 224 students that were distributed into seven classes. The sample of this research was students of class VII A consist of 29 students and VII B consist of 29 students who were selected by cluster random sampling. The design used was the randomized pretest-posttest control group design. Research data were obtained through a essaytest on the comparison. Analysis of this research data used the mann-withney test and proportion test. The results showed that there was no difference increasing of in students' mathematical problem solving ability between the guided inquiry learning model and conventional learning, however the mathematical problem solving ability of students who followed the guided inquiry learning model reached more than 60% of the number of students.Keywords: effectiveness, guided inquiry, mathematical problem solvin