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Habituation programs and teacher training are efforts to improve the quality of education in building a school environment with character. Improving the quality of education continues to experience changes and developments along with advances in time and technology. This research analyzes efforts to improve the quality of education at SMP Negeri 9 Bandung through optimizing teacher training programs and student habituation. The method used in this research is a descriptive qualitative approach through interviews and observations. This research aims to describe a strategy, implementation and also the results of a program to improve the quality of education at the junior high school level. The teacher training program is designed to improve teachers' technical competence and soft skills, especially in the use of learning technology. This aims to improve the quality of teaching and adapt to technological developments. Meanwhile, the student habituation program focuses on character building, such as literacy, environmental cleanliness, sports and religious activities, to foster discipline and a sense of caring. Schools also utilize technology in learning, such as using projectors and smartphones to support computer-based interactions and assessments. Apart from that, collaboration with the community and parents of students is also very important in supporting educational activities, including providing a budget for the Strengthening Pancasila Student Profile (P5) Project activities. This holistic approach creates a conducive and quality learning environment, which has a positive impact on educational outcomes and the achievement of national education goals.

An analysis of the uncertainty value of measuring spur gear dimensions using a profile projector has been carried out. Dimensions of spur gears measured are pitch diameter, root diameter and outside diameter. The manufacture of 3 samples of spur gears was first made with a shape milling machine based on the initial technical data that had been determined. Then measurements were made with a profile projector measuring instrument for the three measuring dimensions, the best repeated measurement average was found in the root diameter measurement for the PJ01 sample of 32.4053 mm with a standard deviation of 0.0077 mm. The uncertainty method used is statistically and applies only to a series of observations. Determination of the uncertainty value is done by performing repeated measurements five times on the same sample. This method refers to ISO GUM with type A evaluation. The uncertainty value obtained for the best measurement is 0.0034 mm with an expanded uncertainty of 0.0068 mm with a 95% confidence level.