This study aims to collect information about the effectiveness of the video-assisted Problem Based Learning model on curved tube side construction material for class XI SMP Negeri 13 Palu. This research is a quantitative experiment with a research design using the One Shot Case Study. Sampling used Simple Random Sampling, class IX B students as an experimental class by applying the video-assisted Problem Based Learning model. The research instrument used was a test to measure the effectiveness of the video-assisted Problem Based Learning model in the form of a short essay test. Data on learning outcomes using statistical analysis t-test using SPSS 16. Criteria for testing one party with dk = n-1 and a significance level of α = 0.05, namely tcount = 5.797>ttable = 1.729 so that the null hypothesis (H0) is rejected and the alternative hypothesis (H1) is accepted, it can be concluded that the video-assisted Problem-Based Learning model is effective in material on curved sides in class IX B SMP Negeri 13 Palu, because the average KKM score is greater than or equal to 75.