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在化学教学中,如能恰当地运用辩证法来指导教学,对于掌握重点,突破难点,加深理解,提高教学效率都是卓有成效的。现将我在这方面的体会略述于后。一、抓住矛盾,讲清道理:大家知道,事物的矛盾是客观存在的,它包括“正”“反”两个方面,既对立又统一。例如在讲化学反应时,把“破”和“立”突出起来,问题就易讲清楚。原化学键破裂,原子间化分,旧分子破坏;新化学键形成,原子间化合,新分子产生。两者之间形成了一连串的对比。在这种对比中,学生的思索一经发动,便如按动电钮,形成联想的通路,一反一正,两相对照,相得益彰,给人以深刻的印象。
In chemistry teaching, if we can properly use dialectics to guide teaching, it is effective to grasp key points, break through difficulties, deepen understanding, and improve teaching efficiency. Now I briefly describe the experience in this area. First, seize the contradictions and make it clear: Everyone knows that the contradiction of things is objective. It includes the two aspects of “positive” and “negative”, which are both antagonistic and unity. For example, when talking about chemical reactions, highlighting “breaking” and “establishing” makes it easy to clarify the problem. The original chemical bond breaks, inter-atomicity breaks, the old molecule breaks down, new chemical bonds form, atoms combine, and new molecules are created. There is a series of contrasts between the two. In this comparison, once the student’s thoughts are initiated, he presses the push button to form a sympathy channel. It is anti-positive, two-in-one contrasts, complement each other, and gives a deep impression.