German senior high school chemistry textbook Today's Chemistry shows the realistic educational ideas of Germans. This paper analyzed the contents arrangement of the chapter "Plastics" in the textbook, found the characteristics of paying high attention to the application of knowledge, refining the technological contents and strengthening the theoretical knowledge, and gave suggestions for the compiling and the use of Chinese textbooks.

This paper introduced the setting and presentation forms of the contents for atomic structure in British Salters Advanced Chemistry textbooks, and summarized four characteristics of the contents setting:(1) Using chemical storylines as a main line to highlight the importance of context in studying chemistry; (2) Attaching importance to the linkages among subjects to improve the students' all-round development; (3) Attaching importance to the coherence of the contents setting, principles and process; (4) Attaching importance to the effective combination of graphic system and chemical ideas to make the abstract into concrete. Finally, some enlightenments of compiling chemistry textbooks were briefly summarized.

This paper expounded the connotation and function of the model and the process of modeling, and discussed two modes of modeling teaching, the differences between modeling teaching and traditional teaching, the value of modeling teaching in improving students' conceptual understanding. Modeling teaching put forward higher requirements for teachers, so teachers should pay more attention to improve students' understanding of the model and provide students with opportunities to participate in the process of modeling.

On the basis of introducing the origin, advantages, basic types and representative thinking activities of thinking maps, this paper cleared that thinking maps not only could be used in the representation and organization of knowledge, but also could describe the process of thinking. Taking "organic synthesis" and "the comparison of ions concentration in the solution" for example, this paper tried to use thinking maps to set up a high school chemistry problem solving model, provide some inspiration for the senior high school chemistry teachers and senior high school students in our country, and give new ideas for chemistry exercises teaching in senior high school.

This paper used the rule space model theory to study the cognitive diagnosis of the mysteries of material constitution in junior high school chemistry. This study applied the mode of determination of attributes, organized the test papers, established the Q matrix between test papers and attributes, tested students, analyzed cognitive diagnosis and found that the students had not grasped these attributes:relationships among atomic, ionic and molecular particle; under-standing of elements closely related to human; recognition of elements and their content in the label; simple calculation of the relative atomic mass and simple classification of elements and so on. This paper also expounded that adding graphics, physical simulation, audio-visual teaching and other visual teaching in the concentration tutorial, laying emphasis on strengthening the study and application of the above attributes could arouse students' reorganization of cognitive structure and promote the development of students' abstract thinking.

The new college entrance examination gave students more choice of subjects, and also brought new challenges to chemistry. In the perspective of chemistry teaching, based on the practice of classified classes for the students of 2014, through the investigation of factors affecting students' choice of chemistry as high school achievement test or college entrance examination subject, this paper studied the effect of new college entrance examination scheme on chemistry teaching, and practiced the corresponding teaching strategies. This study focused on aspects as follows:the change of teaching organization form, the reorganization and integration of teaching content, the multiple complementations of teaching means, the optimization of teaching method, the renewal and development of teaching conception.

Using halohydrocarbon as an example, this paper introduced the important role of Gaussian software in assisting classroom teaching. The geometric structures of intermediates and transition states in halohydrocarbon participated substitution and elimination reactions were visually shown by theoretical calculation. The detailed change process of structure and energy information along the whole reaction pathway was also obtained, which could help high school students understand the nature of chemical bond. Moreover, the introduction of Gaussian made the classroom more active and lively, and laid the basis of college chemistry learning.

This paper introduced students' experiment inquiry of preparation of pH-sensitive sodium alginate microspheres using self-made natural anthocyanin indicator based on STEM education. This experiment was simple to operate, non-pollution, with obvious phenomena and less reagents, through which students' understanding of ionic bond was deepened, and they were able to describe the effect of ionic bond on properties of functional polymer materials.

This paper analyzed the advantages and disadvantages of the experiment designs of reaction between copper and concentrated sulphuric acid, which were presented in the current textbooks and literatures. With the thought of greenization and miniaturization, using disposable syringes and Y-shaped tube, this article improved the experiment device, the whole experiment procedure could be finished in a closed system, and this experiment had the advantages of less dosage, simple operation, obvious phenomena and green.

Using calcium acetate, alcohol and phenolphthalein, this paper designed an interesting experiment of color ice fire ball, and introduced the design reason, the principle and the operation method of this experiment, then discussed some reasons for the color change of the ice fire ball. Finally, this article proposed some reflections for high school chemistry experiment teaching.

The experiment indicated that the white precipitate of Fe(OH)₂ transforming into celadon was not caused by the oxidation of dissolved oxygen, probably because the generated Fe(OH)₂ precipitation adsorbed ferrous ions, and the celadon was caused by the accumulation of ferrous ions, which was confirmed by the solution did not appear red when adding sulfuric acid and KSCN solution in the light celadon precipitate. Then this article used sodium hydroxide ethanol solution (saturated) reacting with the new prepared ferrous sulfate, in which the white floc could be seen for hours.