Despite mounting educational research showing the benefits of collaborative learning, many educators still revert to traditional methods of evaluation. This is particularly true in STEM subjects where assessment is predominantly in the form of individually written tests, and binary marking schemes. In order to combat these limitations, we developed IFCAT: a web-based Think-Pair-Share + Immediate Feedback-Assessment Technique testing app. The IFCAT allows an instructor to easily write questions. Students can then be assigned to groups randomly, and IF-AT feedback (of multiple question types) can then be provided. In winter 2017, students in Statistics II asked to write weekly quizzes by IFCAT. Students’ comments of IFCAT will be presented along with their course performances as quantitative measures of learning-improvement of course contents.