ธรินี มณีศรีTharinee Manisri2025-08-142025-08-142553-https://dspace.spu.ac.th/handle/123456789/10193This research was done a study of the current instructional practices and problems of IEG320 probability and statistics for engineer, Field of study industrial engineering, Faculty of engineering. The main objective was to understand the actual conditions and problems that make the most of students in this subject have grades lower than 2.00. This research also suggested an improving method of teaching and learning. The questionnaire and expert interview were the research tools. The results were showed that the main problem is the teaching technique. The ways to improve the learning achievement are the additional of example, exercises and assignments for both inside and outside the classroom. The student’s interesting was more increasing by using the multimedia instruction. It could be encourage students to interest in studying.ththe current instructional practices and problemsinstructional and teaching techniquespersonality of teacherinstruction mediameasurement and evaluationOther