Abstract: In the context of the deep integration of information technology and education, online and offline hybrid flipped teaching has become the norm. The key elements for the effectiveness of online and offline hybrid flipped teaching mainly include: multiple integrated curriculum resources, teaching resonance of students' online independent learning—offline discussion between teachers and students, teaching quality monitoring by the wholeprocess assessment and dynamic adjustment. In practice, online and offline hybrid flipped teaching has problems in its design, operation and monitoring, which affect its improvement of quality and efficiency. The teaching design, operation and quality monitoring of the "Environmental Resources Law" online and offline hybrid course are integrated, resonant, and modified, which can ensure the teaching quality of the course.

Key words: online and offline hybrid, flipped classroom teaching, effectiveness