Jeroen Donkers of Maastricht University provided a halfday workshop about developing student models in the Games And Learning Alliance (GALA) conference:  The audience included ten scientists and directors of technical and educational institutes from several countries in Europe (e.g. Belgium, Italy, Sweden, Swiss, The Netherlands) and China . After an introduction of the WatchMe project he explained the development of student models with Multi Entity Bayesian Networks (MEBNs). Next, there was a demo on the student models as used in the WatchMe project.  The participant discussed student models, regarding domain, learning environment, goal of the model, variables and mechanisms involved. Then, Jeroen held a demo of building a student model and the participants practices in building models themselves. The workshop was round-off with a final discussion regarding student models.