| Nowadays,Key competency has become a hot spot in the field of basic education.becoming the key factor of implementing new course standard.to find a suitable key competency cultivation method of teaching is of great urgency.In addition,with the rise of big data,the traditional teaching mode needs to be changed,cultivation of talents in the new times standard has a higher and newer requirements.Under the double needs of the severe international situation and the new era personnel training,attempting to explore and implement high school chemistry case teaching.Through the carding of the key competency development vein and the case teaching research status,clarifying the important position of key competency in international development,and the urgency and necessity of its implementation.As an active teaching method based on problem solving,case teaching is very helpful to the cultivation and development of students’ discipline key competency.Therefore,This study combines the two creatively,to explore discipline key competency of chemistry as the core.the entrance examination in recent years as the source of case materials,and "chemical knowledge","practical problems" and "real situation" as the compilation framework,separately with the discipline key competency of three thinking “Macro Identification and Micro Analysis”,“Change Concept and Balance Thinking”,“Evidence Reasoning and Model Cognition” is the center,with the focus on the case of writing.And the " Scientific Inquiry and Innovation Consciousness" as a bridge of the discipline thinking throughout the process of case writing." Scientific Attitude and Social Responsibility" as the value pursuit of the highest level,for the ultimate goal of case writing.Before the implementation of case teaching,using questionnaire survey method to understand and analyze students’ current learning situation and needs,combining the diversified case teaching modes such as analysis and discussion and case inquiry,this paper carries out targeted case teaching design and implementation.In the end,interviewing and summarizing the students’ learning feelings after the implementation of case teaching,and reviews and analyzes the whole class teaching with the method of classroom record,constructing the "quality-oriented" classroom teaching system.The research results show that: Case teaching based on discipline key competency is benefit to building a platform for the development of students’ discipline key competency in chemistry,realizing the transformation from "subject knowledge" to "key competency" for students.Case teaching based on discipline key competency is characterized by its rich teaching situation,open classroom attitude and structured problem design.It has effectively improved the learning problems of current students,such as low interest in learning,weak initiative,monotonous learning methods,unwillingness to learn and inability to learn.It effectively arouses students’ enthusiasm and desire for learning and each student to find his own value in such a process of seeking knowledge.Finally establish the personal lifelong development and social development needs of the correct values,necessary character and key ability. |