凸显科学态度与探究意识的化学实验教学设计及实施——配制一定物质的量浓度的溶液

Design and Implementation of Chemistry Experiment Teaching Highlighting Scientific Attitude and Exploration Consciousness:PreparingSolution with Certain Concentration of Substance

在初中配制一定溶质质量分数溶液的基础上,以“情境化-去情境化-再情境化”的思路设计并组织教学,不仅训练了学生配制一定物质的量浓度的溶液的实验技能,更多地关注了学生科学态度与探究意识素养的发展。通过情境引发问题,去情境化将解决问题的关键转化成学科方法,最后在陌生复杂情境中迁移运用学科方法解决新问题。教学实施超越了单纯的技能训练,拓展学生高阶思维的立意,凸显出严谨求实的科学态度,同时通过精确计量的案例交流,深化了学生对学科价值的认同。

On the basis of the preparation of a certain solute mass fraction solution in junior high school,the teaching was designed and organized with the idea of"contextualization-de-contextualization-re-contextualization",which not only trained the experimental skills of substance concentration preparation,but also paid more attention to the development of students'scientific attitude and awareness of inquiry.The key to solving problems was transformed into disciplinary methods through context-induced problems and de-contextualization.Finally,disciplinary methods were transferred and applied to solve new problems in unfamiliar and complex situations.The teaching implementation went beyond the simple skill training,expanded the idea of higher order thinking of students,and highlights the rigorous and realistic scientific attitude.In addition,the exchange of cases of accurate measurement deepened students'recognition of the value of the subject.