近日听了一位教师《圆的面积》一课,教师在教学时通过巧妙的“投石”让课堂呈现了“波澜壮阔”的情形。题目原本是这样的:“广场花园中圆形花坛的周长为18.84米,花坛的面积是多少平方米?”教师在出示题目时,故意漏掉了“圆形”二字。学生读题时,发现了这一“问题”。教师在鼓励学生的同时,巧妙投下了“石子”:师:同学们真细心,发现题目中没有给出花坛的形状。不过,差一个条件更好,这街心花坛的形 Recently heard a teacher “round area” a lesson, teachers teaching through clever “cast stone” so that the classroom presented “magnificent ” situation. The original title is like this: “Square flower garden circular flower bed perimeter of 18.84 meters, flower beds area is the number of square meters? ” Teachers in the presentation of the title, the intentional omission “round ” word. When a student reads a question, he finds the “problem”. Teachers encourage students at the same time, subtly cast “stone ”: Teacher: the students really careful, found no title of the shape of the flower bed. However, worse one condition is better, this street-shaped heart-shaped flower bed