Due to its highest electronegativity and small size, the incorporation of fluorine into organic compound often brings unique physical, chemical and biological properties. Fluorine-containing compounds have been widely used in various fields including polymers, pharmaceuticals and agrochemicals. This article introduces the basic properties, natural sources, industrial applications, as well as the medicinal and pharmaceutical applications of fluorine.

Developing the evaluation criteria of chemistry academy in senior high school can be carried out in four steps:developing learning objectives, highlighting students' main body; developing evaluation objectives, highlighting core literacy; compiling sample of evaluation, clarifying evaluation grades, and formulating evaluation questions, reflecting evaluation requirements.

In order to implement the concept of "paying attention to the ‘literacy-based,teaching" advocated by the Ordinary High School Chemistry Curriculum Standards (2017 Edition), it is necessary to develop a high school chemistry classroom teaching evaluation standard system. The core elements of high school chemistry classroom teaching centered on "literacy-based" in teaching design, teaching activities, thinking development, and accomplishment of literacy form a classroom teaching evaluation with one core, 4 dimensions and 20 indicators as the basic framework. Through expert consultation, case test and other methods to make the evaluation system more scientific, comprehensive and standardized.

Taking "metal and metal material" as an example, through the analysis of curriculum standards, teaching contents and learning experiences, this paper determines the teaching objectives based on chemical core literacy. At the same time, through the innovative design of authentic and false gold identification scheme and the exploration of different orders of metal activities, the subject core literacy of scientific inquiry and innovation consciousness are implemented. Students learn reasoning based on evidence and constructing model cognition of exploring different orders of metal activities. This cultivates students' ability to use chemical knowledge to solve problems. By sorting out of the contents in class, expand and deepen students' existing cognition and establish the sense of responsibility.

In order to obtain hydrogen energy as a teaching line in classroom teaching, by creating real problem situations, this paper expounds the general ideas and methods of determining, disassembling and solving practical problems. In the process of solving problems, it helps students integrate knowledge, build thinking framework, promote students' ability to solve problems. At last, this paper carries out teaching reflection.

Based on the general method of scientific research, let the students do exercises of "the reaction of Sodium and Cupric Sulfate", then asks them to answer some questions in class. In order to meet the special requirements of each student, according to the students' cognitive structure, teacher adopts the teaching method of group teaching. Finally, by changing the reaction conditions to guide students to explore the reaction of sodium and cupric sulfate. In this way,it can improve students' understanding of chemical changes and cultivate students' core literacy of chemistry.

This paper combs the general sources of teachers' inspiration for teaching design from four aspects:teaching magazines, students' questions, professional knowledge and textbook comparison, and expounds the methods of obtaining and applying teaching inspiration through teaching cases.

Based on Gardner's Multiple Intelligences Theory, this paper explores the parts that can be supported by chemistry teachers' teaching reflections, and then provides a new generation of chemistry teachers with a theoretical framework for teaching reflection.