, the authors present an AR-based learning system for an architecture course according to a formative assessment mechanism that helps learners to find answers by providing hints as they fail to answer questions correctly. The authors conducted an experiment with 39 students in the Museum of World Religions for an architecture course and found that AR-based learning with the formative assessment mechanism significantly enhances the learners' learning achievements and motivation, and also reduces their cognitive load.The second paper "Enhancing students' botanical learning by using augmented reality,"