The author introduces here a system for the excercise, through which students can deepen ability to solve problems associated with the subjects. The system has three features as followings,
1) A lecture is divided into two that is, 50 minutes for lecture and 50 minutes for excercises.
2) Regardless of the procedure of the lectures, each student can select any problems they want among a lot of tasks (1, 000 or more) Students must present their solutions in front of all the classmates.
3) All students are obliged to solve within a year at the least 15 problems for mechanics and 10 ones for mechanical vibrations. The student who cleared this quota can get at the most 40% of the subject's score.
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