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一堂课要有好的开头,如同一出好戏要演好序幕,一篇新闻要写好导语,一部好乐章要奏好序曲一样重要。开头开得好,就能先声夺人,造成学生渴望追求新知的心理状态,激起他们的学习兴趣,吸引其注意力。一、t以旧引新,搭桥铺路tt找准旧知识和新旧知识的联结点,并因情况而异采用不同的方式。一种是联想式:如教《组合图形的面积》中环形面积的计算时,可做一框两幅抽拉投影片。教学时,先出示两两半径分别为5厘米和2厘米的圆,让学生先计算出两
A good start to a lesson, like a good show to be a good prelude, a piece of news to write a good lead, a good piece of music to play the prelude as important. At the beginning of a well-deserved, you can make the first move, causing students to desire the pursuit of new psychological state, arouse their interest in learning to attract their attention. First, to introduce new, bridging the gap to find out the old knowledge and the old and new knowledge of the junction, and use different ways depending on the circumstances. One is associative: as taught in the “area of the combined graphics” in the calculation of the area of the ring, you can do a box two drawing slide. Teaching, first showing two and a half radius of 5 cm and 2 cm of the circle, so that students first calculate the two