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现行化学结论形成教学中,只使用正例而缺失反例,致使某些结论难以自然生成,学生的得出结论能力难以有效培养。本文以概念形成理论为指导,结合实例揭示了反例具有对由正例归纳出的结论共性特征精确化、本质化和严谨化等精加工功能。期望重视弥补反例,完善结论的形成教学,提升结论生成的自然性与学生得出结论能力训练的有效性。
In the current chemistry conclusion forming teaching, only the positive examples are used and the counterexamples are missing, which makes it difficult to produce certain conclusions naturally. It is difficult for the students to draw conclusions from their ability to cultivate effectively. This thesis is guided by concept formation theory, and examples are given to reveal that counterexamples have precision functions such as precision, intrinsic, and rigorous refinement of commonality features concluded by positive examples. It is expected to pay attention to remedying counterexamples, improve the formation of conclusions in teaching, improve the naturalness of conclusion generation and the effectiveness of students’ ability to draw conclusions.