【摘要】 当前,化学大概念教学面临教师理解不足与教学融入困难的双重挑战,学科理解可以作为解决问题的突破口。基于学科理解的化学大概念教学可以本原性问题、认识视角及概念层级结构为线索,建构“学科认识层—教学设计层—教学实施层”一体化框架。以大概念为认识对象,揭示学科功能、建构认识体系、统整结构框架,可确保教学高阶性、建构式和结构化设计。围绕大概念的表征、建构和诊断,大概念教学实施可采取如下策略:围绕本原性问题,布置学习任务;基于认识视角,开展学科实践;完善学科思维,推进动态评价。更多还原

【Abstract】 At present,chemistry big idea teaching is confronted with the challenges of teacher’s insufficient understanding and difficult integration of teaching and the understanding of subject can tackle the problem.Chemistry big idea teaching based on the understanding can take original problem,cognitive perspective and conceptual hierarchy as clue to construct an integrated framework of discipline cognition,teaching design and teaching practice layer.Taking big idea as cognitive object,we can reveal disciplinary function,construct cognitive system and integrate structural framework to ensure the high-order,constructive and structured design of teaching.Focusing on the representation,construction and diagnosis of big idea,the following strategies can be adopted in its implementation:arranging learning tasks around original problems,carrying out disciplinary practice based on cognitive perspective,and improving the way of thinking and promoting dynamic evaluation.更多还原