Selected high school chemistry exercises to strengthen the normative

Abstract: Exercise is a high school chemistry students in high school chemistry concepts to grasp and understand the chemical principles, develop thinking skills, form an important means of scientific literacy in the context of the new curriculum, the provincial education department "five strict" requirements of the new situation, high school chemistry teachers in the teaching process to the usual selection of high quality chemical exercises to alleviate the burden of student learning, improve the quality of teaching chemistry, students interested in learning chemistry is particularly important and urgent the article mainly describes how the teachers in the teaching process to enhance Selected exercises normative.

Keywords: Chemical Exercise, normative, Selected Exercises

First, preparation exercises to strengthen the principle of
This paper is to examine how a selection of exercise science, to maximize the effectiveness of exercises to improve the quality of teaching does not involve the preparation of the original problem of exercises, but if we are familiar with the basic principles of the preparation exercises, the same selection of exercises for science to play a guiding role. In general, the preparation of exercises should follow the following basic principles:
1. Scientific Principles
Exercise science, not only refers to the exercises related to the knowledge content of science, but also exercises the situation is true, exercise is concerned with whether it is a real chemical problems. Teachers in the selection of exercises, the first screening exercise, according to this principle For those complex, difficult, partial, old, out of life and the actual production, simply play the math game exercises should be bold removed.

2. Guiding principle
High school chemistry curriculum standards: high school chemistry should enable students in the knowledge and skills, processes and methods, attitudes and values ​​to be three-dimensional targets and harmonious development of teachers in the selection of exercises, the high school for those who will help strengthen the basic knowledge of chemistry, basic skills, help develop students ability, analytical ability, innovation, help to stimulate the enthusiasm of students to learn chemistry, will help cultivate sentiments of students to form positive emotional exercises should be given priority. Selected Exercises should be oriented, the students through exercises exercise at least three goals in one aspect of teaching has improved for those who do not help guide students to focus on key content knowledge and attention exercises, likely to cause confusion of the exercises the students, teachers in the selection of exercises should be firmly rejected.

3. Zone of proximal development principles
Exercise knowledge of the contents involved with the students to be able to present a considerable level of knowledge, or even a good exercise not only failed to play its proper test students' knowledge, the role of ability, but students can create negative emotions, even is a weariness of emotions, so teachers in the selection of exercises, we must fully understand student learning conditions, the difficulty of exercises should be appropriate to enable students to "jump jump, touch." This is the psychology of the zone of proximal development principles.

Second, to strengthen high school chemistry curriculum standards, textbooks, exam descriptions of
High school chemistry curriculum standards, teaching materials, examination shows that each high school chemistry teachers must have teaching materials for teachers to implement the main basis for chemistry teaching. High school chemistry curriculum standards is a programmatic document, is the basis for learning and teaching materials for teachers to implement the teaching process , choice of teaching methods based on written materials is based on curriculum standards, is student learning, teachers implement the teaching of primary reference materials, test instructions are provided in the course curriculum standards developed under the guidance of the normative goal of teaching content and learning content specific documentation. Currently, the test shows there are "academic proficiency test (compulsory" test description and "elective" test shows a selection of exercises should be closely linked to curriculum standards, textbooks and examination instructions. In order to improve the quality of teaching, teachers should be between strengthen the discussion, together, give full play to collective wisdom school chemistry teachers can prepare lessons group as a unit, with periodic teachers teaching content related to this year's curriculum standards, descriptions of teaching and examinations.

Third, functional exercises and exercises to strengthen the teaching research
Chemical process of teaching, the teaching phase of the exercises are different with different functions (1 semester program can be divided into normal, period, end, and this corresponds to the exercises can be divided into the usual exercises, midterm and final pre- Review Questions (2) to divide part of teaching, exercises can be divided into the preview issue, typical examples of classroom, classroom test questions, after-school consolidation of job title, chapter review questions, unit test questions (3 to grade division, high-grade chemistry, the term learning <<compulsory 1>> next semester <<compulsory 2>>, the learning content is for all high school students, the exercises should be to consolidate and strengthen the foundation of basic scientific research students method-based, chemistry sophomore year in high school the first year based on the content of the elective for chemistry students set up, including <<>>,<< basic organic chemistry and life >>,<< chemical reaction principle> >, <<structural chemistry>> and so on, the depth and breadth of content relative to the required significantly enhanced to meet the grade three to review the main entrance, corresponding to the exercises can be divided into basic questions, mid-range questions, problems and improve the comprehensive questions, etc. at different stages of exercises, test a different focus, when teachers in the selection of exercises, according to the actual selection of teaching practice and student exercises. Links to free download http://www.hi138.com
To test questions, for example, if a clearance test, the topics should be the basis of questions, supplemented by a small number of questions and very few mid-range raise questions, if it is the ability of the test questions will have a reasonable increase and improve mid-range problems ratio.

Fourth, pay attention to a gradual selection of exercises, different levels to promote
High-grade chemical is mainly <<compulsory 1 "and the <<compulsory 2>>, the content is compulsory junior high school chemistry students on the basis of further improvement and expansion, and an elective for students learning the content and continue to raise the level of chemical knowledge necessary the bedding. to <<compulsory 2>>, for example, a total of four chapters content, including Chapter <<chemical reaction and energy>>, Chapter <<organic "content in the junior high school chemistry, high school elective compulsory teaching materials and in both arrangements, both the learning stage, there are compulsory, elective levels, in the specific content around there overlap and duplication, the students presented the concept of formation and development of spiral form, so teachers in the election , compiled exercises, the student must be based on the actual situation and the actual teaching hours, a reasonable choice that will help students grasp the basic concepts and basic skills, the formation of the exercises if exercises selected, compiled not pay attention to step by step, advance levels, teaching process as long as the entrance is an excellent question, simulation title, non-selective, advanced training for students, not only can not play the role of exercise training should be, but also increase the burden of student learning so that students feel difficult to learn chemistry, so very High School Division in some of the students choose to stay away from chemicals.

Fifth, the establishment of Exercise library, a selection of exercises to lay a good foundation
Each school the usual exercises, midterm, final examination questions, the entrance-level cities throughout the simulation problem, the provincial college entrance examination questions and even race problem, the number of exercises each year exponentially rapid growth. With the rapid development, teachers can first a time to get over the exercises, which create their own exercises for the school library provides a guarantee. Exercise library building is a systems engineering school to prepare lessons according to the actual teaching group as a unit, lesson planning group to strengthen the cooperation between teachers, In high school, sophomore year can be divided into sections, the establishment of exam, third-year review of progress under review module exam to establish the teacher's exam in the establishment of a chapter, first, to establish a chapter exercises total folder, and then, in accordance with teaching sub-chapter exercises to create a folder, such as the preview issue, classroom test questions, after-school consolidation questions, chapter review questions, problems such as unit test for a knowledge module exercises, a teacher may exercise the degree of difficulty in accordance with basic questions , mid-range problems, questions, etc. to improve further the establishment of sub-folder, a selection of exercises for teachers and lay a good foundation.

In short, the exercises teaching high school chemistry teaching, especially important part of the third year of teaching, I believe that as long as the teachers teaching in the usual course fully aware of the importance of teaching exercises, a selection of exercises to strengthen the normative and scientific selection of exercises, you can most a higher level of chemistry teaching efficiency, reduce the burden on students.

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