This research aims to 1) develop the project-based learning using discussion and lesson-learned methods via social media model (PBL-DLL SoMe Model) used for enhancing problem solving skills of undergraduate in education student, and 2) evaluate the PBL-DLL SoMe Model used for enhancing problem solving skills of undergraduate in education student. The samples groups are 9 specialists in education, enhancement of problem solving skills, educational technology, and computer and communication technology selected by purposive sampling. Thereafter, researcher analyses the data statistically by examining the mean () and the standard deviation (S.D.).

The research result shows that (1) the PBL-DLL SoMe Model used for enhancing problem solving skills of undergraduate in education student, consists of 4 components which are 1) the analysis of the readiness of the input factors, 2) the process of the PBL-DLL SoMe Model, 3) the evaluation of the achievement of learning and problem solving skills (Output), and 4) the evaluation of the result between evaluating and feedback. (2) The evaluation result of this research project on the PBL-DLL SoMe Model for enhancing problem solving skills of undergraduate in education student shows that 1) the mean () of the results of evaluated input factor readiness is valued at 4.50. The The standard deviation (S.D.) is equal to 0.80. 2) The mean () of the process PBL-DLL SoMe Model is valued at 4.52. The standard deviation (S.D.) is equal to 0.62. 3) The mean () of the evaluation of the achievement of learning and problem solving skill (Output) is valued at 4.62. The standard deviation (S.D.) is equal to 0.72. 4) The mean () of the evaluation between process and feedback is valued at 4.71. The standard deviation (S.D.) is equal to 0.48. 5) The mean () of the overall evaluation of the developed learning model is valued at 4.53. The standard deviation (S.D.) is equal to 0.75. Therefore, the developed learning model is rated as most appropriate in terms of quality.