弱智学生借助手的操作,可以实现和反映其内部的思维活动,让多种感官参与到学习当中,从而在与学习材料的互动中,愉快地获得数学知识和技能。教师应适时营造良好的学习情境,进行多样化操作,激发兴趣;加强操作目标化,体验数学;强化操作中评价,开阔思维;指导参与操作,提高效率。要遵循弱智学生的认知规律,发挥他们的主体性,从而使“操作法”发挥最佳效果。 Mentally handicapped students can realize and reflect their internal thinking activities through the operation of the hand, so that various senses can be involved in the study so that they can enjoy the mathematics knowledge and skills happily in the interaction with learning materials. Teachers should create a good learning situation in a timely manner, conduct diversified operations and stimulate their interests. They should also strengthen their operational goals and experience mathematics. They should also strengthen their evaluation of operations and broaden their thinking. They should guide their participation in operations and enhance their efficiency. To follow the cognitive rules of mentally handicapped students, give play to their subjectivity, so that “operation method ” to achieve the best effect.