课堂练习,是化学课堂教学中的一个重要环节,它不但可以帮助学生及时巩固在课堂上所学的知识和技能,而且对教师来说也是检查学生学习知识和应用知识等具体情况的有效方法。课堂练习是沟通教与学的桥梁,也是师生之间进行信息交流的重要渠道。通过课堂练习能够及时提供教学的反馈信息,帮助教师对教学目标的达成程度加以准确定位,以便及时调整教学策略,促进 Classroom practice is an important part of chemistry classroom teaching. It not only helps students consolidate the knowledge and skills learned in the classroom in time, but also is an effective way for teachers to check the students’ learning and application of knowledge. Classroom practice is a bridge between teaching and learning, as well as an important channel for information exchange between teachers and students. Through classroom exercises can provide timely feedback of teaching information to help teachers reach the goal of teaching to be accurate positioning in order to promptly adjust teaching strategies to promote