A portfolio model was developed which can serve as an alternative to the literature study with practical processing, the predominant dissertation model used in teacher education courses in Flanders. Using a pre- and post-test quasi-experimental design with 174 teacher students and 44 supervisors, we examined whether the use of portfolio as a dissertation model has a greater effect on the students' capacity for independent learning than the literature study with practical processing, using three questionnaires. The research shows that portfolio results in students acquiring greater metacognitive knowledge. It also appears that students only get the chance to use their metacognitive skills when supervisors give them sufficient autonomy. However, supervisors experience loss of control and therefore tend to restrict students' autonomy. This leads us to the paradox of independent learning: students will only learn independently when they are given the opportunity to learn independently. Supervisors need to transfer learner control. (Contains 7 tables.)