I. Sabilah, J.T. Manoy
Feedback deals with giving information to students related to their task which is done through score of their achievement, reaction, and comments. Considering its hierarchy, task difficulty level consists of low, middle and high levels. The difficulty level of open-ended questions is middle to high. Open-ended question is a good way to train students' knowledge. This research is a descriptive research which aims at describing teacher's learning management, students' activities, students' learning achievement, and students' responses in mathematic learning using OEQGF. The subject was a teacher of mathematics who teaches eighth graders, and students themselves. The research design used is one shot case study. The result shows that: management learning has been very well implemented by the teacher; every students' activity has been carried out by students; the students' learning achievement have reached the criteria of completeness, and the students' responses can be considered as positive. Therefore, it can be concluded that mathematic learning using OEQGF is effective. © Published under licence by IOP Publishing Ltd.
Postgraduate Programme in Mathematics Education, Universitas Negeri Surabaya, Ketintang, Surabaya, 60231, Indonesia; Mathematics Department, Universitas Negeri Surabaya, Ketintang, Surabaya, 60231, Indonesia
