The aim of the NetWoRM Project is the development, evaluation and implementationof a case-based e-learning tool for occupational medicine to increase the knowledge in clinical aspectsof occupational medicine. To date, 19 e-learning cases have been developed. Cases were validated by 2experts and user evaluated. Results of the user evaluation at 3 German Medical Schools are presented.Of 557 medical students registered for the online course 377 answered the online evaluation form (68%).Depending on the case, the median time spent on a case ranged from 25-43 minutes. Students enjoyed workingwith the cases and asked to replace more seminars by case-based e-learning. The level of knowledge requiredto work on the cases was rated high. This was supported by the fact that on median only 47-71% of thequestions were answered correctly. Cases focusing on occupational health problems such as needle stickinjuries were rated highest with respect to fun, importance for future career and the overall score.Students enjoy working on e-learning cases as an add-on to traditional teaching. Because of the highinternational interest the NetWoRM project is currently shared on an international base.