Abstract: Nowadays, It is not easy for students in the common universities to imagine the shape of a
3D object from a group of 2D views when they are learning the course of the mechanical engineering
graphics. Some students are less self-binding and their learning initiative is not high. Therefore, the
blended learning has been carried out in the process of instruction, based on the Bloom’s mastery
learning theory and the American undergraduate education reform in Research-oriented universities which
has been developed on the student centered (SC) Learning since 1980s. It includes SC large class teaching
and small class discussion, online and offline class, combination of theory and practice. The result shows
the blended learning has promoted students self-study and improved the quality of teaching.

Key words: mechanical engineering graphics, teaching mode, spatial imagination ability, mastery learning theory