Himmatul Ulya, Lutfi Maulida, Nur Aini and Deni Ainur
Keywords: Assessment for learning, Go formative, concept mastery
Abstract: The aim of this research is to test the influence of assessment for learning by using Go formative web to student’s physics concept mastery. This research is a quasi experiment with pretest-posttest control group design. The research population is all of grade X MIA MAN 1 Malang year 2016/2017. The research samples are X MIA 1 and X MIA 3, each consists of 33 students. Cluster-random-sampling method is used to determine the sample of this research. X MIA 3 is the control class with direct-instruction model and X MIA 1 as an experiment class applying assessment for learning by using Go formative. Data analysis shows the students’ concept mastery of X MIA 1 is better than X MIA 3. In conclusion, assessment for learning using Go formative web influences much on students’ physics concept mastery.