Research On The Design Strategy And Practice Of Junior Middle School Geometry Micro-course Based On Van Hiele Theory

In recent years,the education of ‘The Internet +' and ‘Artificial Intelligence +' has given rise to the era of education that pursues individuation,fragmentation and micro-learning.Due to the prominent theme,short and concise,convenient application,quick transmission and other characteristics,micro-lessons can meet the current needs of ‘The Internet +' education such as Mobile Learning,Personalized learning and B-learning.After Entering the information era,our country make much account of new teaching resources development and the information technology assimilated into mathematics education.As a new type of teaching resources,The micro-lessons are increasingly attracting the attention of the general educators,Due to the micro class quality is intermingled,how to design a high quality micro-lesson has become an issue that needs to be solved.Plane Geomery is an important branch of mathematics in middle school.Geometry learning plays an important role in cultivating students' logical thinking ability,which is also a big challenge for teachers to teach students.Van Hiele theory is one of the most influential theories in geometry teaching.Under the guidance of van Hiele theory,this study attempts to design a micro-lesson teaching of Plane Geometry in junior high school,so as to improve the effectiveness of micro-lesson learning.This research have mainly carried on the theory research and the practice research.In terms of theoretical research,first of all,through the literature,I summarized the research which concerned the concept of micro classes and teaching strategy,trying to define ‘ microclasses' and ‘teaching strategy' form two core concepts,and then combed research situation of the micro lessons at home and abroad,for summarizing the basic theories,the design and development research,application and evaluation in present situation of domestic micro classes' research.Then based on van Hiele theory,this paper discussed the micro-course design strategy of Plane Geometry in junior middle school:Intuitive level--intuitive perception contextualization,Descriptive level--graphical representation dynamics,Theoretical level--knowledge construction systematization,providing the strategy application of practical cases.Finally,taking the micro-lesson of the properties of isosceles triangle and parallel lines as an example,themicro-lesson design strategy of Plane geometry in junior high school was applied to optimize the design.In practicl research,through the experimental study and research combined,first,I adopted the strategy design of the nature of the isosceles triangle class which applied for teaching practice,to investigate the students' views on the micro-lesson,and analysis the students' mastering degree of this section's knowledge,for the purpose of further optimization.Based on that,Design the micro-lesson of the properties of parallel lines and apply it to teaching practice.With teaching experiments as the main task and investigation as the supplement,examine the influence of the micro courses designed according to the strategies on the learning results and learning process of students.The results show that the micro-class of Plane Geometry in junior middle school based on strategy design has a positive effect on the improvement of students' academic performance.The micro-course based on strategy design has a positive influence on students' learning process(knowledge understanding,emotion and attitude,etc.).The vast majority of students hold a relatively positive attitude towards micro classes.