《义务教育国家数学课程标准》十分强调通过数学学习 ,使学生在提出问题、分析问题、解决问题等方面都获得充分的发展。在教案设计中 ,积极为学生创设或提供一个问题情境 ,让学生在问题情境中自立探索 ,在交流讨论、动手操作中解决问题 ,开发潜能。下面以《圆锥体体积》教学部 The National Mathematics Curriculum Standard for Compulsory Education places great emphasis on learning through mathematics to enable students to achieve adequate development in raising questions, analyzing problems and solving problems. In the design of lesson plans, students are encouraged to create or provide a problem situation so that students can explore themselves independently in problem situations, solve problems and develop potentials in exchanges and discussions. Below the “cone volume” teaching department