设计开放性练习是实行开放式教学的重要一环。教师在教学中经常设计一些开放性练习，能优化学生的思维品质，提高学生的练习兴趣，达到减负增效，把时间还给学生的目的。 　　一、设计实践性开放题——培养思维的创造性 　　俄国教育家乌申斯基指出：“没有丝毫兴趣的强制性学 Designing open practice is an important part of the open teaching. Teachers often design some open exercises in teaching, which can optimize the thinking quality of students, improve students' interest in practice, achieve the goal of reducing the burden and increasing the efficiency and returning the time to students. First, the design of open practical problems - the training of creative thinking Russian educator Uzushinski pointed out: "not the slightest interest in mandatory study