科学课就是通过一系列的探究活动使学生的思维得以推进,即在实践描述中使学生的感觉水平发生认识,通过交流思辨使学生的知觉水平发生认识,通过研究探讨使学生的前概念得以认识。因此,要达到“轻负高效”的课堂,首先课堂教学环节要力求简约,教师要做到心中有学生,课堂教学要为学生学习需要着想。 Science class is through a series of inquiry activities to enable students to think forward, that is, in the practice of description to make students feel the level of awareness, through the exchange of thinking to make students aware of the level of awareness through research to enable students to understand the preconceptions . Therefore, in order to achieve “light and highly efficient” classroom, the first part of the classroom teaching should strive to be simple, teachers should be aware of students, classroom teaching needs to be considered for students.