There is an argument used by observers of successful education systems in the world, that great education systems have the best quality teachers. But such teachers are not simply developed through initial teacher training but rather through continuous professional development. In other words, the best teachers are learning teachers that continue to develop and learn as they grow in their profession.
When you look at project-based learning and the theories and goals behind it, such as constructivism, experiential and reflective learning, collaborative learning and individual growth, all these are features that a teacher needs to have to take charge of his or her learning in the course of the profession. It is therefore not far fetched to argue that PBL in pre-service teacher education does not only serve immediate learning needs but it also builds lifelong learning skills that pre-service teachers will need for the rest of their teaching careers.
Here is an interesting video by the Australian Institute for Teaching and School Leadership (Aitsl) highlighting the importance of teacher learning and successful education systems. Take a look and reflect with comments.