合肥市第六中学化学教师袁玲君从1984年开始进行“预习、讨论、讲练”三结合的课堂教学改革实验。这一改革体现了以学生为主体、教师为主导的原则,从而激发了学生的学习兴趣,启迪了学生的思维,发展了学生的能力。改革实验分为三个程序。 Yuan Lingjun, a chemistry teacher at No.6 Middle School in Hefei City, began experimenting with classroom teaching reforms that consisted of “preparation, discussion, and practice” in 1984. This reform embodies the principle of being student-centered and teacher-centered, thereby stimulating students’ interest in learning, enlightening students’ thinking, and developing students’ abilities. The reform experiment is divided into three procedures.