This paper compared metal part in chemistry textbooks for junior high school published by People's Education Press of China and American mainstream junior high school science education textbook Science Explorer from content framework, materials arrangement, activity setting and so on. And some suggestions on chemistry teaching and textbook revision were proposed.

Exercises matching with the textbook played an important role in teaching, and it could effectively examine the students' knowledge and skills, learning process and methods, and cultivate students' consciousness and ability of social participation. This paper analyzed the characteristics of the examination contents of exercises in junior high school chemistry textbook published by People's Education Press of China, and discussed the differences between exercises in this textbook and other supplementary exercises in detail, in order to help teachers to understand the exercises correctly and use the exercises reasonably.

This paper introduced classroom teaching of "inquiry on components of chlorine water" by two teachers in teaching research activities of heterogeneous forms for the same lesson, analyzed the characteristics of inquiry methods, experiment contents and experiment means in the two classrooms, and showed students' learning activities and experiment inquiry process.

This paper designed an inquiry experiment in the teaching of "reversible reaction", and put forward the design ideas and structures of the inquiry experiment in the teaching of concept assimilation:designing experiment based on the new concept, students explaining the experiment with original concept, using cognitive conflict to explore the experiment, using the results of the study to assimilate concept. This paper aimed to solve the problem of how to make full use of inquiry experiment to complete the teaching of conceptual assimilation.

This paper analyzed and confirmed the key behavior factors of autonomous inquiry teaching model, gave operational contents of them, and analyzed the lesson of copper-zinc primary battery.

Before the unit review of hydrocarbons and halogenated hydrocarbon, this paper probed the students' mastery of organic compound cognition and basic knowledge, and then this paper targeted the core teaching recitation as establishing the organic compound cognition based on chemical bond and promoting the high school students' organic compound cognition development. Based on the teaching objectives, this paper designed the cognitive tasks, issues, activities and specific teaching process. This paper designed two kinds of tasks to achieve the same class of heterogeneous. Through the teaching practice, this paper analyzed the teaching effectiveness and explored the teaching strategies of promoting the students' organic compound cognition development.

This paper quantitatively analyzed subjective questions of Shandong college entrance examination of chemistry from 2013 to 2015 based on SOLO classification theory, comparatively studied some measured data such as the distribution of scores on four levels of SOLO of test questions, item difficulty and discrimination, in order to find the suitable SOLO item structure for college entrance examination of chemistry in the future.

This paper investigated the status of teaching interaction in senior high school chemistry classroom from three dimensions:teacher-student interaction, students' interaction and interaction with artificial teaching products, analyzed the main problems and reasons, then proposed some countermeasures such as fully understanding the function of teaching interaction, optimizing the strategies for teaching interaction, developing the skills of teaching interaction and improving the evaluation methods.

This paper designed comprehensive experiment of hydrolysis of cupric chloride, decomposition of hydrolysis product, and decomposition product reduced by carbon. It was easy to operate and experiment phenomena were obvious, thus the teaching effect was very good.

On the basis of references about improvement of laboratory preparation of ethylene, this study showed the improvement of laboratory preparation and property test of ethylene from the selection of chemical reagents, experiment operation and optimization of device.

The reagent bottle was not sealed tightly, so the gas flowed in and out of the bottle, which was the main cause of many chemicals changes. The effect of using wax-sealed protection of chemicals was the best. This paper analyzed the surface tension and appropriate temperature of molten paraffin wax, determined the position of wax-sealed, and described the making of wedge pen, operation process and method of wax-sealed.

Using crystal mud as experimental materials, this paper designed two classroom demonstration experiments:water absorption of superabsorbent resin and Tyndall effect of colloid. The experimental phenomena were very obvious, the experimental materials was colorful, and the classroom atmosphere was active. Crystal mud was safe and easy to get, and the experiments were easy to operate, which was convenient for students to carry out family experiment.

Based on the swollen problem of electrode type hot-water bag, this paper studied the energy conversion in electrolysis process of alternating current, electrode reaction and the working principle of electrode type hot-water bag. The results showed that electrolysis of alternating current was mainly electrical energy into heat energy, and hydroxyl ions discharged easily than chloride ions under the action of alternating current.

Based on the introduction of Arrhenius rate equation, this paper explained the concept of activation energy in the perspective of collision theory, transition state theory and Tolman statistics. The results showed that judging reaction rate by only activation energy was imprecise, and analyzed the question from the view of teaching and preparing test questions.

This paper introduced American chemistry week in 2014 "the Sweet Side of Chemistry:Candy", focused on the experiment activities, and briefly introduced the sections of scientific reading and the chemists in the future. Some enlightenments on chemistry teaching in China were got:(1)pay attention to the development of food science; (2)focus on the integration of scientific reading; (3)reflect the diversity of experiment design; (4)pay attention to the combination of informal learning and formal learning; (5)reflect the idea of "chemistry serves life".