Gama Feedback Learning Model (GFLM) is a method of learning that adapted from a feedback-control system in engineering. It is designed especially for the mastery learning that uses e-learning. Students will receive more complete and perfect learning environment. With enough time and the right way of learning, students can achieve mastery. The objective of this paper is to build a blended learning model that combines face-to-face and e-learning based on the GFLM. The e-learning models that have been built then tested in the group of students who attend English courses for grammatical mastering. The obtained results are very significant, 100% of the students in the experimental group achieved mastery, and 40% of students in the control group achieve mastery. Whereas for the testing of implementation by using Partial Least Square (PLS) stated that mastery is 93.4% affected by the interface, the effectiveness of a tutorial, the learning treatment, the student motivation, and the student activities, and 6.6% affected by the unknown variable.