"Basic knowledge of mathematics and science and expertise as a technician" is cited as one of "knowledge, skills, and attitudes required for engineers who will be responsible for the future" in CDIO syllabus, and CDIO Standard 8 Active Learning ", which is a framework for training engineers consisting of 12 standards. We have practiced introductory statistics lecture using Peer Instruction (PI) which is one of active learning methods. PI has many conceptual problems developed in physics and many practical examples. In mathematics, however, conceptual problems are extremely small, so we have gathered together among faculty members to analyze the results of implementation of PI, develop and improve mathematical conceptual problems, and strive to improve teaching ability among teachers (CDIO Standard 10). Also, as a feature of PI, it is said that general teachers can easily practice active learning in regular classrooms, so we expect to contribute to the further development and popularization of CDIO.