教师信任学生,启发学生目已去思考问题,解决问题,与不信任学生,样样包办代替,教学效果是大不一样的。有位教师为小学生提供了橡皮泥、玻璃球、小石头、小铁圈、小木块,海绵、乒乓球、瓶盖和一盆水,让学生把这些东西放到水盆里,看有什么变化,并让学生说出有几种情况。经过一阵摆弄,学生纷纷发言,说出了三种情况:沉底、浮起、沉到一定深度。教师又提出:如何让下沉的物体浮起来,又如何使浮在水面上 Teachers trust students to inspire students to have to think about the problem, solve the problem, and do not trust the students, everything arranged instead, the teaching effect is very different. A teacher provided pupils with plasticine, glass balls, small stones, small hoops, small wooden blocks, sponges, table tennis, bottle caps and a pot of water, so that students put these things in the basin to see what changes , And let the students say there are several situations. After a while playing, students have to speak, said three situations: sinking, floating, sink to a certain depth. The teacher also put forward: how to float the sinking objects, how to float on the water