Study On The Arrangement And Practice Of Chemistry Exercise In Junior Middle School Based On The Ebbinghaus Forgetting Curve

The chemistry education at the compulsory education stage is the enlightenment stage of the chemistry subject.It mainly aims to cultivate students' interest in chemistry,and help the students to understand the principle of material composition.In addition,it can cultivate students' scientific inquiry ability and scientific literacy.After the new curriculum reform,the difficulty of chemical calculation is reduced.The chemistry education in junior high school focuses on the joy of chemistry.It can help the students to combine their life experience with existing cognition,and employ chemistry knowledge in practice.Therefore,the chemistry in junior high school is not difficult to understand and less logical.But,it is a subject with a lot of knowledge to be understood and recited,which increases the difficulties of chemistry learning.The students need to master effective memory techniques to learn chemistry and build confidence for the study of chemistry in high school.Aimed at the character of the chemistry knowledge in junior high school,this paper proposes an Ebbinghaus' s forgetting curve based choreography model for the exercises,which makes full use of the validity of the exercises in reviewing and understanding.In this model,moderate exercises is inserted after 20 minutes,9 hours,one week and two weeks of finishing study.It can help the students to consolidate what they have learned in a timely and eliminate blind spots of knowledge.In order to verify the validity of the this model,a comparative experiment was carried out in two classes.In this paper,two examples of “chemical formula and valence” and “how to correctly write the chemical equation” are listed to explain how to combine this model with specific topics.It can be seen from the experimental results that the proposed choreography model for the exercises can improve the students' ability to recite and apply chemical knowledge effectively.It can help the students to establish their self-confidence of scientific research and appreciate the charm of science.This study provides a practical basis for the application of Ebbinghaus' s forgetting curve in exercises.