课堂教学环节的优化设计与实施——以《心脏的结构和功能》一课的观察研究为例

The Optimal Design and Implementation of Classroom Teaching Link:Taking the Observational Research of Cardiac Structure and Function as an Example

本文从课堂教学的整体流程和教学环节的设计与具体实施( 包括教师讲解、辅助媒体的使用和师生互动情况) 对一堂初中生物课进行了观察、记录和评析，并进一步阐述了优化课堂教学环节设计与实施的相关启示。

The classroom instruction's overall flow and teaching link's design and concrete implementation ( including the teacher's explaining， instructional media using， and the situation about teachers and students' interaction) are observed， recorded and evaluated. The article further illustrates the enlightenment to optimal design and implementation of teaching link.