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数学课程标准指出:“数学课 程应突出体现基础性、普及性和发 展性”。对于“发展性”要实现“不 同的人在数学上得到不同的发展”。 在第三学段(7-9年级)教学建 议中要求教师从实际出发,要创造 性地使用教材,创设有助于学生自 主学习的问题情境,具体的设计方 式可以是就同一问题情境提出不同 层次的问题或开放性问题．以使不 同的学生得到不同的发展;要善于 激发学生的学习潜能．鼓励学生大 胆创新与实践。
The mathematics curriculum standard states: “The mathematics curriculum should highlight basic, universal, and development.” For “development”, we must realize that “different people have different developments in mathematics.” In the teaching recommendations in the third section (grades 7-9), teachers are required to proceed from reality and creatively use teaching materials to create problem situations that will help students learn independently. The specific design approach can be to propose different levels on the same problem situation. Problems or open issues. To enable different students to develop differently; to be good at stimulating students’ learning potential. Encourage students to boldly innovate and practice.