The Research On The Construction Of Teaching Mode Of PBL-based Mechanical Drawing Course In Secondary Vocational Schools

Secondary vocational education requires further deepening of teaching reform,not only to cultivate students ’practical ability,but also to conform to the trend of modern education development,to cultivate students’ life-long learning and other abilities,to promote the development of vocational education in a comprehensive and comprehensive direction,and to improve school quality.In PBL(problem-based learning),teachers guide learners to cooperate in exploring and constructing knowledge in real and specific problem situations to develop learning ability and problem solving ability.This teaching method is worthy of reference for vocational education teachers in teaching practice Learn from.The teaching research of mechanical drawing based on PBL is of great significance to the reform and development of the teaching work of secondary vocational education.This research focuses on the following three aspects:1.Conducted a questionnaire survey and interviews with teachers and students of processing and manufacturing majors in secondary vocational schools,and statistically analyzed the survey results to understand the current status and needs of the teaching of mechanical drawing courses in vocational schools;2.Adopt literature analysis method,investigation research method,experiment research method,classroom observation and other methods,and carry out the construction and research work of teaching mode under the guidance of constructivism learning theory and metacognition theory.Firstly,the PBL-based mechanical drawing course teaching mode was constructed from five aspects: theoretical basis,teaching goals,realization conditions,activity procedures and evaluation system,combining professional positions,strengthening the connection between the teaching content and professional course knowledge and strengthening the students’ metacognition these three aspects,designed a five-stage teaching process that includes encountering problems,clear topics,inquiry by teamwork,learning methods and skill-enhancing,and developed an evaluation system that formative evaluation combined with summative evaluation,online evaluation combined with offline evaluation,the evaluation of a mechanical drawing teacher combined with the evaluation of a teacher in a professional course.Then it discusses the instructional design using the constructed teaching model.3.Carried out the experimental study that lasted for three months.Taking the two classes in a vocational school of Qingyuan City as the experimental objects,adopting the pretest and posttest experimental design,the PBL-based mechanical drawing course teaching mode is used in the experimental class,and the control class follows the traditional teaching mode.After the experiment,through the statistical analysis of the experimental data and the test results of the students in the experimental class and the control class,and the final test scores,and finally combined with the classroom observation records,the feasibility and effectiveness of the teaching model were verified.The results show that the teaching mode of PBL-based mechanical drawing course has been recognized by the students in the experimental class,and the problems existed before the experiment,such as students’ low participation in learning,poor ability of map reading and drawing,and low professional quality,have been improved.In terms of students,this teaching mode improves students’ initiative to participate in classroom activities,improves students’ spatial thinking ability and cartographic ability,and cultivates students’ rigorous and standard drawing habit and meticulous and serious working style.In the aspect of teachers,this teaching mode promotes the improvement of the teachers’ ability of organizing classroom knowledge and classroom management.