Ding Jian lesson plan series is a set of lesson plan series carefully planned by nearly 100 teaching assistant research experts, relying on Yanbian Education Publishing House's years of experience and resource advantages. Most of the teaching cases in the book are excellent works widely collected in the whole country, which are the crystallization of the experience and wisdom of the first-line super senior teachers in the country, representing the direction and the highest level of current teaching reform, and can be called excellent works.