Abstract: In order to improve students' enthusiasm for learning and critical innovation consciousness, a three-step experimental teaching method has carried out by the research group.. The teaching of this model is guided from different knowledge dimensions and cognitive dimension design. It concluded three-steps: before-class tasks (students block out experimental scheme with teacher), classroom instruction (students study with classmates) and after-class reflection (both students and teachers). Students can freely explore, review, collect, discuss and solve some problems. Practice shows that through the teaching methods, students can take the initiative to assume the main responsibility in the learning process, practical ability to be greatly improved.