教学是教师的教与学生的学相互作用、相互影响的双边活动过程。现代认知理论主张 :学习是学习者已有的认知结构与新知识的重新建构过程 ,通过建构 ,将新知识纳入到自己的认知结构中。知识并非客观存在 ,它对于不同的学习者来说 ,具有主观性 ,正如“一千个读者就有一千个哈姆莱 Teaching is the interaction between teachers 'teaching and students' learning, which influence the bilateral activities. Modern cognitive theory holds that learning is the process of reconstructing the existing cognitive structure and new knowledge of learners. By constructing, the new knowledge is incorporated into their own cognitive structure. Knowledge is not objective, it is subjective to different learners, just as "a thousand readers have a thousand Hamlet