一个优秀的教师应是学生学习的珍断专家,一个优秀的化学教师应是学生学习化学的诊断专家。他(她)应能指学生学习化学时所存在的问题,双基知识上的缺陷或学习能力、学习方法上的不足;指明改进与矫正的方法。在当前我们的班级群体教学中,做到这一点的最佳途径是实施形成性测验与评价。本文拟就化学教学中如何实施形成性测验与评价的具体方法,作初步的介绍。 A good teacher should be a definitive expert in student learning. An excellent chemistry teacher should be a student’s diagnostic expert in learning chemistry. He (she) should be able to refer to the problems that students have when they study chemistry, defects in the dual-basic knowledge or the ability to learn, and the lack of learning methods; indicate the methods of improvement and correction. In our current class teaching, the best way to do this is to conduct formative tests and assessments. This article will provide a preliminary introduction on how to implement formative tests and evaluations in chemistry teaching.