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A quantitative method for selecting, organizing and structuring the content of chemistry courses is proposed in this article.
Introduction The problem of selecting and structuring the content of an educational material in chemistry in accordance with the number of hours regulated by the curriculum was always in the forefront for teachers of chemistry in the universities.
Despite the fact that the structuring is proposed by the authors of chemistry textbooks, it is adjusted by each lecturer in the framework of specific chemistry training courses annually.
This allows to take the semantic structure of the paragraph for the semantic structure of the concept itself, the completeness of the contents of which is determined by the educational level of the given chemistry textbook.
Fig. 4 shows the complete semantic structure of an educational material unit "The rate of chemical reaction" from elementary chemistry, and Fig. 5 shows the corresponding graph.

Introduction Organic chemistry is one of the important branches of chemistry.
There are three items of organic chemistry got Nobel Prize in Chemistry in the recent ten years.
The 12 principles of green chemistry widely recognized in international community at present are: · prevent pollution from the beginning; · atom economy principle; · avoid toxic and harmful substances to the full; · design efficient and harmfulless product; · use as least reaction supplies such as solvent as possible; · consuming less energy in manufacturing; · use as much reproducible material as possible; · try to produce as less side products as possible; · choose catalyst with high selectivity; · use degradable material; · real time monitor the emergence of harmful material; · try to reduce accidental risks to the full.[1] I personally have made some beneficial explorations on the infiltration of the sense of green chemistry in organic chemistry teaching, Infiltrate Green Chemistry in the Teaching of Organic Chemistry Theory At present, the teaching materials of university organic chemistry generally involves only the structure of organic compound and its nature
The organic chemistry course is difficult for students to learn and can hardly interests them as the content is too large and sundry, reaction types too many, the structure too systemic, theory expoundation too abstract in some contents such as reaction mechanism, stereochemistry, etc.
Multimedia-aided teaching can help students quickly build up space model in their minds, make it easier to learn and improved teaching efficiency by displaying the stereochemical structure of organic molecule vividly and directly.

The integrity and comprehensive structure of the subjects of Physics and Chemistry in high schools define the subsequent level of the students’ ability to understand complicated chemical laws of the environment.
The structure of the connected course is shown on the top of the space table with inter-subject links.
The connectedness of two courses has been calculated through a qualitative feature between the force of connection of two Physics and Chemistry courses in the group of physical terms by the following formula (1) where N - is a number of structure elements of the connected course; F - is a sum of all forces in the group of terms.
However, it is quite reasonable and complies with the logic of the textbook structure.
Chemistry for 8-9th grades.

Directing at the characteristics of the basic chemistry, the paper discusses the characteristics of the “Inorganic chemistry”, “organic chemistry”, “physical chemistry” and “analytical chemistry”, and points out that application of multimedia in the basic chemistry is in line with student’s learning and cognitive rules.
Inorganic chemistry, organic chemistry, analytical chemistry and physical chemistry are the chemistry, chemical engineering, environment, biology, medicine, agriculture class specialized important public fundamental course.
For example, to show the molecular structure of diamond, we can gradually combine to form spatial configuration of diamond with tetrahedral configuration by illustrating the basic structure of C atom with sp3 hybridization.
Through such demo animation, students can understand and remember diamond structure from visual observation to understanding.
Some abstract concepts and structure problems, such as carbon atomic hybridization state, isomerism phenomenon, stereochemistry and molecular structure change in organic chemistry, can be illustrated and visually represented by 3D studio max.

America Chemistry Society presents 12 guide linesof green chemistry.
Then we study the infiltration of green chemistry in "Chemistry".
Proposed "green chemistry" slogan.
According to the size and structure of mica , adopts the stage for recycling, selection process for the rod mill - screening - re-election - flotation.
When students learn the basic knowledge of chemistry ,they will be edification of green chemistry, and in the course of study chemistry is also mastered green chemistry knowledge for future use.

The chemistry of polymers mainly teaches the mechanism of various polymerizations, the physics of polymers mainly introduces the relationship of structure and properties of polymers.
The physics of polymers introduces the structure and properties of polymers; it includes structural layers, the first layer structure, conformation and aggregational structure, further, three mechanical states of polymers under heating or force.
The chemistry of polymers introduces mechanism of polymerization, chemical reaction of polymers, including the velocity of polymerization, degree of polymerization, structure of polymers, chain transfer, and so on.
Abstract Micro-structure.
The page has clean structure.

Secondly, the rich and colorful interest chemistry history in the teaching material, such as "Dmitri Mendeleev discovered the element periodic law in playing solitaire", "Kekule dreamt enlightenment benzene molecule structure", "HouDebang’s alkali manufacturing" etc, can let students to experience the joy of scientific discovery.
In fact, through the study of the periodic table of the elements, we can associate to halogen, carbon group element, oxygen group element, and nitrogen group element, etc., and we can associate to nature from structure, to application from the nature, again to the nature from the application, and to its possible structure from the nature.
Let students understand that there is chemistry everywhere in life, and understand affinity between the chemistry and daily life.
Journal of Chemistry Teaching, 2007 (1): 33-34
Zetetic Learning Strategies on Chemistry.

Review: Stress-Induced Diffusion and Cation Defect Chemistry Studies of Perovskites K.
Creep studies of several perovskiterelated or perovskite-like structures are reviewed next, and the similarities/dissimilarities to perovskites are outlined.
Defect chemistry modeling from creep data is presented for these two cases.
Some high temperature superconductors also possess perovskite-like structure, often thought of as a layered perovskite.
The B/A ratio of 1.5 in these compounds results in a layered and complex structure.

Attributable to the controlled nature and the quantitative yields of Click Chemistry, the prepared PEG-based hydrogels have the well-defined structures, which resulted in the improved mechanical properties and the high swelling ratios of hydrogels.
“Click chemistry” [6] is a strongly growing approach to synthesize the well-defined and complex macromolecular structures because of it’s high specificity, quantitative yields, and functional group tolerance.
Hawker group constructed well-defined PEG hydrogels by Click Chemistry[4].
This highly porous structure is beneficial to water diffusion and results in the high swelling ratio.
The well-defined network structures result in the excellent mechanical performance and the high swelling ratios.

This study aimed to assess the responses of chemistry teachers regarding the provision and management of chemistry experiments in school laboratories.
Online Questionnaires: Structured questionnaires were distributed to 30 chemistry teachers.
The Limitations of Chemistry Laboratory Management Managing a chemistry laboratory comes with its own set of challenges, for example: resource management.
Chemistry Teachers Response about Chemistry Laboratory in This Digital Era Based on the results of a survey of 30 chemistry teachers in Jakarta area regarding the existence of chemistry laboratories in the digital era, the following results were found.
Development of Android-Based Mobile learning media on Atomic Structure and Periodic Table.