布卢姆的“掌握学习”策略是以单元作为教学基本单位的.单元教学的实施首先是将单元教学目标分解到课时教学过程中去,但仅仅完成课时的分节目标还远远不能代替单元目标.单元教学的分课时授课完成以后,设置一节至两节单元综合课,然后进行单元形成性评价,对提高单元达成度,落实单元高层次教学目标有重要作用. Bloom’s “learning to master” strategy is based on unit as the basic unit of teaching. The implementation of unit teaching is firstly to decompose the unit teaching goal into the class teaching process, but the segmentation goal of completing the class hours is far from a substitute for the unit. Objectives. After the completion of class teaching for unit teaching, set up one to two units of integrated courses, and then conduct unit formative evaluation. This has an important role in improving the unit’s attainment and implementing the unit’s high-level teaching goals.