Importance of educational practices has been increased to enhance students' motivation to learning. It is necessary to understand the students’ minds to learning in class. From the point of view, class questionnaires in engineering subject, “Construction materials”, for the second-year student in the department of Architecture and Civil Engineering of Kumamoto National College of Technology were carried out to bring up voluntary minds of the students for learning. The students’ minds to learning, self assessments and sense of achievements can be evaluated from the questionnaires. It is found out from the analysis of the questionnaires that the presented activity in class is effective for improving students’ minds for learning and voluntary minds for learning are increased by making preparations for the subject.