The core foundation for doing well in science education addition in the"double reduction"of education lies in the high-level implementation of science courses.On the basis of years of distinctive development in science education,Zhongguancun No.1 Primary School has gradually standardized its science curriculum system and nurtured a mature"three-three"principle practice model.The principle serves as the action guide for science teachers,based on curriculum standards and textbooks,with subject practice as the new direction,to promote the high-level implementation of primary school science curriculum and continuously achieve new breakthroughs,ultimately turning to subject practice comprehensively.