A Comparative Study Of New And Old Mathematics Teaching Materials In Senior High School

With the popularization of the General High School Curriculum Standards(2017 Edition),the textbook of Edition 2019 has been put into use in most parts of the country.As an important basic elementary function in the whole function system,the content of trigonometric function has obviously changed from the old textbook to the new one,so it is of great practical significance to study the difference of trigonometric function between the old and the new textbooks.Using literature analysis and case analysis,this paper selects the trigonometric function module of Experimental Textbook Mathematics 4 of General High School Curriculum Standard 2007 as well as Mathematics 1 of General High School Textbook2019 as a sample,then compares and analyzes the similarities and differences between the two editions from the aspects of teaching objectives,content structure,content difficulty,example difficulty,use of information technology and selection of materials.The study finds that trigonometric identity transformation and trigonometric function are merged into one chapter in the new textbook,the content of trigonometric function line is cut out,the unit circle is entirely arranged after function and its properties,which strengthens the application of unit circle.As the last basic elementary function under the main line of function,this arrangement pays more attention to the connection of knowledge and takes into account the characteristics of students' thinking development.Based on the existing curriculum difficulty model,this paper compares the curriculum time,curriculum breadth and curriculum depth,and finds that the curriculum difficulty of the new textbook is slightly lower than that of the old one.According to the multi-factor model of the comprehensive difficulty of sample exercises established by Bao Jian sheng,this paper compares the sample exercises from five difficulty factors,and finds that the total number of sample exercises is reduced,the requirements for "reasoning" and "comprehensive application of knowledge" have been raised.At the same time,the arrangement of the exercises in the new textbook embodies the layered design,which makes different students develop in different degrees,and the content and range of the new textbook are more substantial in the use of information technology and materials.