Research On "Chemistry In Seawater" Unit Teaching Based On STS Education

STS education is an important learning content of junior high school chemistry,and also an important way to cultivate students' scientific literacy.The unit of chemistry in seawater,the second volume of ninth grade of junior high school chemistry in shandong education edition,provides abundant STS educational materials.Based on the content of "chemistry in seawater",this study explores the formation of unit teaching design idea on the basis of STS education,so as to better implement the STS education idea and cultivate students' scientific literacy.Based on the basic idea of STS education,this student-centered research designed the unit teaching project of "chemistry in seawater" from three perspectives,they are "chemistry in life,science promotes technology and technology serves society".Under the condition of keeping the total number of class hours unchanged,the unit of “chemistry in sea water” was reintegrated into three sections: understanding the ocean,exploring the treasure of sea water and making good use of things,and designed each teaching period in datial.In order to explore the effectiveness of the teaching design scheme,in this study we selected two classes of Grade Four students who are at the same level form Linzi No.2 Middle School,Zibo City,Shandong Province as the research objects,and carried out a three-week teaching practice research.At the end of the teaching,the self-developed test paper,likert scale questionnaire and students' in-depth interview were used to measure the teaching practice effect.Through careful and in-depth analysis of the survey data,the following conclusions are drawn:(1)The remarkable feature of this study is to guide students to simulate the establishment of factories for many times and infiltrate students' ideas of chemical production by using the ocean as the background resource.In this process,guided by the rigorous and realistic scientific attitude,students have been trained to use chemical knowledge to solve practical problems in social life,and have been taught to use scientific methods for problem analysis,which significantly improves their comprehensive ability.(2)The new research brings a new model,which brings a large number of STS materials that are popular with students.The new learning method is integrated into the learning process,more experiments and activities are created,and a large number of opportunities to participate in the classroom are presented to the students,thus significantly improving theirlearning enthusiasm and participation.(3)Questionnaire and interview results prove that this study effectively promotes students' understanding of the content of STS itself,and students understand the dialectical relationship among s-t-s;Students are very interested in the content of STS,they learn the production ideas of chemical products,and pay more attention to science and technology in social life.(4)This study guides the students to observe from the Angle of chemistry,in which a lot of useful information related to sea,sea water and material are chosen and integratd,which broaden the students' vision,it also shortens the distance between the students and science and technology based on the learning experience of simulating factory many times,which greatly aroused the students' attention to social problems and awearness of participation.Finally,the problems in this research are reflected and the direction of future research is prospected..