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近日,笔者有幸参加了某校举办的校级优质课大赛.虽然只是校级教学比赛,但是10位参赛选手的课各具特色,各有精彩之处!其中一位踏上工作岗位才两年的教师所执教的沪科版《数学》(上)“两直角三角形全等的判定”给我留下了深刻的印象,启发颇深!1.课例展示.1.1复习巩固,导入新知师:同学们,前面几节课,我们共同学习了一般三角形全等的判定,你知道有哪些判定方法吗?众生:SAS,ASA,SSS,AAS.师:很好.SSA可以吗?众生:不可以.师:为什么?(由于前面已经学习过,学生很快就举出了反例)
Recently, I was fortunate enough to participate in a school sponsored by the school quality class contest .Although only the teaching at the university level, but the 10 contestants have their own unique features, each with its own wonderful! One of them set foot on the job only two years The teacher of Shanghai Science and Technology, “Mathematics” (on) “two right triangles congruent determination ” left a deep impression on me, enlightenment deep! 1 class show .1.1 review consolidate, import new knowledge Teacher: Students, the first few lessons, we learned together the judgment of the general triangle congruent, do you know what to determine? Beings: SAS, ASA, SSS, AAS. Teacher: Very good.SSA can? Beings: No. Teacher: Why? (As soon as I have learned, the students quickly set out examples)