The Research Of Chemical Symbol Cognition Based On Knowledge Classification

Nowadays,with the rapid development of economy,science and technology,the competition of strength between countries has been transformed into the competition of talents.Therefore,the cultivation of talents with core literacy is the top priority of each country’s development.The implementation of core literacy needs to be distributed to various disciplines.Chemistry plays a vital role in the process of cultivating students’core literacy,The literacy of "Macroscopic analysis and microscopic identification" is the most basic literacy in the core literacy of chemistry,an important literacy to adapt to lifelong development,a key literacy to meet the needs of society,and a fundamental literacy to help students master general learning methods.Therefore,it is of great significance to cultivate students’ literacy of "macro identification and micro analysis"with taking organic compound knowledge as the carrier.Based on the "Teaching research of organic compounds under the literacy of macro-micro combination",the core concepts and related theories were defined by combing and integrating the relevant literature at home and abroad;This paper investigated the obstacles to improving students’ macro-micro combination literacy in current classroom teaching;According to the survey results and theoretical analysis,a study procedures of "teaching preparation","teaching design","teaching implementation" and "teaching evaluation" were constructed,and the corresponding teaching strategies were put forward;Subesquently,The teaching practice was carried out,and the teaching practice results were obtained through the usual teaching observation and specific data analysis,and the following practical conclusions were obtained:（1）This core literacy improved the students’ "macro-micro combination"literacy level;（2）"Macroscopic analysis and microscopic identification" helped students to build chemical thinking model and master the way of combining macro and micro to solve problems;（3）This core literacy helped students to have a solid foundation of knowledge;（4）The ability of students to solve comprehensive（complex）problems was improved.This paper was divided into four parts:The first part described a study background,cleared study issues,study purpose and significance,stydy ideas and methods.The second part was to sort out the relevant literature,defined the relevant concept,and cleared theoretical basis.The third part finded out the shortcomings of the current chemistry teaching through the questionnaire survey and teachers’interviews.The fourth part designed related teaching procedures and carried out teaching practice by combining the characteristics of orgathjnic compounds knowledge.Through a study on organic compound teaching under the combination of macro and micro literacy,a study conclusions were as follows:（1）"Macroscopic analysis and microscopic identification" had helped students establish the knowledge structure system of basic organic chemistry;（2）The core literacy had improved the ability of macro micro integration to analyze problems and improved the literacy level of macro micro integration;（3）students’ ability of chemical sensitivity,analyzing and solving problems from a chemical perspective had been improved;（4）"Macroscopic analysis and microscopic identification" had been able to update teachers’ teaching concepts that they would pay attention to the improvement of students’ core literacy.