化学大概念单元教学:内涵价值、设计模式及实施策略

Unit Teaching Based on Chemistry Big Concept:Connotation,Model and Strategy

化学大概念单元教学,即将化学大概念与单元教学有效整合的教学形式。其价值体现在融合二者特征以发挥各自优势,使知识在真实复杂的学科问题或跨学科问题的解决过程中得到迁移和应用,深化学生对化学学科思想方法的理解,培育其化学观念,发展其科学思维。化学大概念单元教学设计包括确定预期结果、确定合适的评价证据、设计学习体验活动三个阶段。在实践中,应渗透化学学科思想观念,创设单元主题问题情境,组织单元主题学科实践活动,引入化学发展史实。

Unit teaching based on chemistry big concept integrates big concept with unit teaching.It can take the advantage of both of them so that knowledge can be transferred and applied in disciplinary or interdisciplinary problem-solving and teachers can deepen students'understanding of chemistry ideology,cultivating their concept and develop their scientific thinking.Its model includes three stages:predicting expected results,determining evaluation evidence and designing activities.In practice,we should infiltrate chemistry idea,create problem situation of unit theme,organize disciplinary activities of unit theme and introduce historical facts of chemical development.