Flexible teaching is essentially a new strategy for teaching "stability and change". The characteristic of traditional linear thinking is diachronicity, while the characteristic of flexible thinking is synchronicity without specific restrictions.Teaching allows students to understand the natural order of the development and evolution of things from the seemingly chaotic and complex phenomena, gain insight into the next step forward, identify potential unknown needs and develop students' thinking, and then foresee changes and automatically cope with changes. This is the essence of flexible teaching innovation.

Flexible teaching is marked by "humanization" and emphasizes jumps and changes, speed and response, sensitivity and flexibility. Flexible teaching does not mean no principles. It complements and complements institutional teaching. Teaching requires harmony, and harmony is inseparable from flexible teaching and institutional teaching. Grasping the scale of teaching and flexibility in teaching is the art of teaching.