In this study,we examine the effect of conducting problem posing learning in high school mathematics and having students self-evaluate the “degree of completion of problems” they have created with their “attitudes of proactive learning”.We also examine the effect on promoting an essential understanding of mathematics and self-directed learning.As a result,students could meta-reflect on their own learning by creating problems,with repeated problem posing learning expanding their perspectives and,leading to an essential understanding of what they have learned.