The Research And Implementation Of PBL In Chemistry Teaching In Senior Schools

With the coming of the knowledge economy, information and globalization age, dramatic changes in the respect of people's way of living and learning have occurred, and meanwhile new and higher requirements of the talent nurturing are posed. The increasing demands of talents from the society pose new challenge to education. In our country, with the spreading of the education reform great changes happen in terms of our notion of education, which advances new requirements to the way of talent fostering. As Decisions about deepening education reform and promoting comprehensive character education from the central Party and the state council puts it, intelligence education work should actively carry out elicitation and discussion approaches to activate student independent thinking and creativeness and improve class teaching efficiency.Moreover, attention should be attached to the whole process of students' tasting and understanding the beginning and development of knowledge, to foster students' interests in science and creative way of thinking, to foster the ability of collecting and sorting out information and getting new knowledge, the ability of how to analyze and solve problems, and also the ability of self expression, cooperation and social work.However the current education situation is not satisfactory: teaching doesn't go with practice; mono-way of teaching; the process of knowledge teaching is limited to mechanic repetition; what the students can do is just how to answer questions but not how to find questions to ask, which leads to many students' high score but low ability and lack of creativeness. In order to change the situation new modes of teaching must be explored, among which problem-based learning is one of the effective ways. With all the background, from the theory and practice perspectives, the essay elaborates on the exploration and research of the problems that will appear in the implementing process of problem-based learning mode. The essay first goes to details about the connotation, characteristics, principles and the process of the problem-based learning.The problem-based learning dates back to the teaching reformation in American medical academies, which puts study in a complicated, ill- structured, authentic problem circumstance and through this lets students become the center. In this circumstance students start to analyze problems by themselves, study scientific knowledge hidden behind problems, during which students' ability of self-solving problems is fostered and then by letting them approach real problems step by step their self-learning ability is developed.After that the essay explores humanism, some metocogtive theories, constructivism studying theory, situation learning and studying theories by citation.At last, the essay adopts cases to introduce its own practice and research, including the basic process of problem-based learning, how to set questions, how to comment, and the roles of teachers in it.Through the research we can easily find that problem-based learning promotes using the problems originated from students' daily life, and requires students to find out the necessary information, familiarize themselves with real situations, solve key problems by themselves, raise the final solution to the basic components, transform student' role to be the active one, and foster students' ability of collecting and sorting out information, the ability of gaining new knowledge, the ability of analyzing and solving problems, the ability of expression, cooperation and social work. There is no doubt that problem-based learning will meet the demands by the modern society made to talents who not only possess knowledge, but the ability to use knowledge to solve problems. In our curriculum reformation the problem-based learning mode can be circulated.The research of the essay is conducted with the purpose of facilitating our understanding of craft brothers and offering some help to study through carrying out discussion in class.