“学而不思则罔”是说明了学习过程离不开思维活动。在化学学习中,无论是学生理解掌握化学知识,还是通过分析去应用知识,自始至终都存在着积极的思维活动。学生思维能力的强弱,往往是衡量学生的学习效果、学习潜力和学习水平的重要标志。教师是否通过双基教学的过程,激发学生的积极思维、循序渐进地培养学生的思维方法、思维能力,这往往也是决定化学教学质量的关键。一、充分运用演示实验、实验习题的教 “Study but not thinking is ambiguous” means that the learning process is inseparable from thinking activities. In chemistry learning, whether students understand the knowledge of chemistry or analyze it to apply knowledge, there are active thinking activities from beginning to end. The strength of student’s thinking ability is often an important indicator of student’s learning effect, learning potential and learning level. Whether or not teachers use the dual-basic teaching process to stimulate students’ positive thinking and develop students’ thinking methods and thinking skills step by step is often the key to the quality of chemistry teaching. First, make full use of demonstration experiments, teaching of experimental exercises