Research On The Design And Application Of High School Chemistry Microclass Based On Key Competenices

With the popularity of the Internet,the micro-lectures with micro-videos as the main form have entered the field of vision of teachers and students,and are deeply loved.Because of having the some merits such as short hours,few memory,simplifying contents,Micro-lectures is beneficial to the students' self-study and the professional growth of teachers.Hence,foreign countries began to set off an upsurge of research on micro-lectures.In recent years,micro-lectures have also developed rapidly in China.From elementary school to university,many teachers pay more attention to micro-lectures.In the teaching of high school chemistry,the use of micro-lectures can develop the students' ability to learn and think independently,comply with the demands of the key competencies of students in education development and training students to become fully-developed and useful talents.In order to keep up with the development of the times and meet the requirements of educational goals,the “Hydrolysis of Salts” in Chapter 3 of the “Principles of Chemical Reactions” of the PEP Elective was selected in this paper.Under the guidance of the teaching goals of the core literacy of chemistry,it is designed to be a series of micro-lectures,such as "explore the acidity and alkalinity of salt solution and its causes","the writing of salt hydrolysis equation","the factors influencing the hydrolysis of salts","the application of salt hydrolysis," "Comparison of the Concentration of Ions in Salt Solution with Three Conserved" Salt Solutions.In practical teaching,these micro-lectures are applied before class,during class,and after class.When used in class,students' performance in the classroom was observed.After the teaching practice,a questionnaire survey was conducted on students from class 7 in grade two in Senior High School,students and lecturers were interviewed.It is believed that the use of micro-lectures can help students learn chemistry,improve students' enthusiasm and confidence for learning chemistry,and also improve the efficiency of learning chemistry in class.