Abstract: Based on the concept of multilevel teaching of college physics，various means of teaching are discussed for the purpose of enriching the contents，interesting and motivating the students.Classroom teaching can be extended to the online platform，and the content of college physics course can be extended from theory to practice by experiment demonstration and student exploration.Specific methods for both in and outside class teaching are explained too.The author hopes to explore a practicable way of consolidating physics attainment of engineering students by balancing between knowledge and capability，emphasizing both process and method and by attaching importance to student emotions and values.

Key words: college physics, extended teaching, online teaching, experiment demonstration and student exploration, physics attainment 