The teaching mode of "double class double credit" refers to the addition of the second class practice content on the basis of the first class teaching around the course objectives. Students taking this course will receive both first class and second class credits as required by the syllabus. Based on the analysis of course characteristics of polymer modification

the original "one-way output of teachers "teaching model is switched into" topics as goal orientation

teachers' teaching and students’ practical parallel" teaching mode. Polymer modification is first joined the "double class double credit" course listing

and the characteristics of this kind of teaching mode are illustrated through the "flame retardant modification "and "enhanced modification" of the course.