随着新课改的进一步深化,课堂正从传统的教学模式中解放出来,而其中重要的一条是要改变学生的学习方式,变被动为主动,充分发挥学生的自主学习精神,并通过勤于动手、乐于探究的多种形式的科学探究活动,培养学生获取知识的能力,体验科学的过程和方法,培养创新能力和实践能力。如何利用好课堂40分钟来进行有效的教学,使学生在课上接受并掌握较多的知识和技能就变得至关重要。 With the further deepening of the new curriculum reform, the classroom is being liberated from the traditional teaching mode, and an important one of which is to change the students ’learning styles, to become passive and initiative, give full play to the students’ self-learning spirit, Hands-on, willing to explore various forms of scientific inquiry activities, develop students’ ability to acquire knowledge, experience scientific processes and methods, and cultivate innovative and practical skills. How to make good use of the classroom for 40 minutes to make effective teaching so that students acquire and acquire more knowledge and skills in class becomes crucial.