教学目标(1)掌握程序框图的概念;(2)会用通用的图形符号表示算法,掌握算法的顺序结构和条件结构;(3)掌握画程序框图的基本规则,能正确画出程序框图。设计意图(1)让学生学会思考;(2)培养学生发现问题的能力;(3)培养学生归纳总结的能力;(4)让学生掌握程序框图的基本知识,同时培养 Teaching objectives (1) grasp the concept of block diagram; (2) will use common graphical symbols that algorithm to grasp the sequence structure of the algorithm and the structure of the conditions; (3) grasp the basic rules of the block diagram, the right to draw the block diagram. Design intent (1) to enable students to learn to think; (2) to develop students’ ability to detect problems; (3) to develop the ability of students to summarize; (4) to enable students to master the basic knowledge of the block diagram,