High School Chemistry,"Crystal Structures And Properties" Difficulties Test Check And Countermeasures

Research on learning difficulties is one of the research hotspots in recent years, and the study matures. However, this study also have two problems: one is the study of thisdifficulty from easy to disciplinary background,resulting in metaphysics. The study concluded that the difficulties in different disciplines can be applied; the lack of features of each discipline, practical significance is not strong. Second, the study does not go in depth, helping to solve specific problems disciplines offered limited. Although the research discipline that focuses on the background, but the scope of the study is quite large. As in chemistry,the study of a textbook,such as compulsory learning difficulties1;knowledge or study of a module,such as learning difficulties conceptual knowledge. Therefore, the notion of specific knowledge, such as the concept of redox reactions knowledge of teaching, such a study to help is limited.Learning difficulties to determine the different types of modules, and there may be common knowledge, so you can do some of the macro, the static study. However, because of geographical constraints and the development of the times,all the same difficulties of knowledge may not reflect the same time,some difficulties may appear more prominent, some difficulty may temporarily is no longer a difficulty.So for the difficulty of determining the specific subject knowledge call empirical research, hope can be concluded in the survey in order to provide help in the confidence range.Chemical studies on high school elective3" material structure and properties," the difficulties, there is a lot. However, these studies on the reaction of the above two problems. Meanwhile plus modules "material structure and properties" in the "Crystal Structures and Properties" Because knowledge of geometry and spatial imagination student capacity constraints and other factors, it has always been more difficult to study knowledge. Based on this, from the "Crystal structure and nature" of both static and dynamic analysis of student learning difficulties.On a static difficulty, mainly use literature. By high school curriculum standards, chemical entrance exam notes and five different levels of college entrance examination questions,the consistency of the different versions of textbooks and supplementary information,such as static in-depth research,to provide for the study of theory," Crystal Structures and Properties " dynamic difficulty guidance. Mainly as follows: the curriculum standards, set goals are more vague, not specific enough;chemical entrance exam instructions and guidance entrance theme too strong;different versions of textbooks reflect too obvious differences, learn from each other is not enough; supplementary information in the questions selective enough, more difficult, pointing obvious place.On dynamic difficulty, mainly use investigation and interview. By means of a survey of teachers, student surveys, examinations and case studies, test check current" crystal structure and properties of " dynamic learning difficulties. Through the teacher’s measurements, find the current status of teaching teachers need to change; curriculum standards, exam notes, textbooks need to change the use of the concept; external environment also needs to be changed, such as teaching. The survey found that the students found that teaching students to current knowledge, there are many who do not understand; poor learner autonomy; improper use of multimedia; interest in learning is not high enough; knowledge of learning, such as lack of meaning construction. On examinations of students were analyzed and found significant differences in the performance of students; computing power is weak, weak, etc. migration calculations. Case studies of students found that students were generally weak in computing power; lack of interest in learning; lack of knowledge representation capability.Combined analysis of " crystal structure and properties of " static and dynamic difficulty and found the current difficulties," Crystal structure and properties of " outstanding performance as part of the learning of students cognitive deficits generative, meaning construction of the degree is not enough; lack of student thinking space learning transfer capacity is insufficient; students lack knowledge of fine processing, knowledge and memory of negative migration in three aspects. And put forward the causes of the difficulties of static and dynamic and static performance to determine the causes of fuzzy goals for the curriculum standards; exam notes, exam guide too strong; textbook selection inelastic; module positioning itself to increase the difficulty of learning the four aspects. Dynamic performance of the causes of lack of teachers’professional knowledge; curriculum standards, textbooks, exam notes and assignments of the four contact needs to be strengthened; lack of knowledge generated three aspects.For static and dynamic causes difficulty breakthrough countermeasures are also divided into static and dynamic measures:Measures the performance of static strengthen curriculum standards operability; reduce the role of the college entrance examination guidance notes and the questions; elastic instructional design; faithful implementation of the new four courses spirit. Strategies for teaching before moving into strategies and teaching strategies. Teaching Strategies include strengthening professional knowledge before learning; studies curriculum standards, textbooks, exams and job description contact the four aspects:When teaching strategies, including the creation of scenarios, stimulate interest, rational selection and use of multimedia, the use of formulas to help memory the use of contrast, sum, selected questions for practice, carried interest groups, develop an interest in six countermeasures.