Connotation And Culture School Chemistry Quantitative Strategy Concept

Quantitative concept is not only one of the nature of the chemistry, but also is an improve part of scientific literacy. The conduction of quantitative concepts is good for the foundation of a better thinking quality、 rigorous scientific attitude and learning interests.Based on the interviews with outstanding teachers relevant literatures、philosophical principles and secondary school textbooks, this paper sums up the basic meanings of quantitative concepts, including:(1) The substance exists in the form of a certain "quantity";(2) Chemical reaction takes place according to a certain "quantity" relationship;(3) Quantitative qualitative change in the law;(4) Concerns on the subtle "quantity" in experimental operations;(5) Implement quantitative control in chemical experimental design;(6) Chemistry has the specific quantitative method.Based on the above work, the paper implemented a quantitative concepts test on three regular sophomore classes of Beijing4th High School, and found many problems, such as unable to understand the true source of the quantitative relationship between chemical substances、understandings on the meanings of the Law of conservation of mass is not thorough enough、lack of analysis capabilities of "quantitative" dynamic process, ignore of subtle "quantity" in experimental operations and so on.Focus on the problems, after analyzed typical lessons, this paper proposes the following suggestions:(1) grasp the growing point of knowledge to achieve its dynamic generation;(2) using experiments flexibly to make cognitive conflict;(3) paying more attention to experiment design and evaluation to deepen quantitative awareness;(4) Standardize experimental operation, promote micro-experiments to establish awareness of green chemistry;(4) create of problem-drive situation to complete quantitative experiments. May these strategies can contribute to the formation of students’ quantitative concepts.