珠算教学三步曲备·讲·练□兰州农校赵淑琴一、备课１脑中有纲。备课时，首先应根据教学大纲、教学目的决定教什么，不教什么，然后根据珠算课“易学难精”的特点确定如何教。最后了解教学材料的体系及基本内容，明确教法上的基本要求，再统观全局，脑中形成一个纲，... Abacus teaching three steps  prepare · speaking · practice □ Lanzhou Agricultural School Zhao Shuqin First, lesson preparation 1  in the brain. Preparation lesson, the first should be based on syllabus, teaching purpose to decide what to teach, do not teach anything, and then according to abacus class “easy to learn difficult to difficult” to determine how to teach. Finally understand the teaching material system and the basic content, the basic requirements of a clear method, and then re-view the overall situation, the brain form a key, ...