Working together - advantages

PBL and Technology use bring a new relevance to the learning at hand
by bringing real-life context and technology to the curriculum through a PBL approach, students are encouraged to become independent workers, critical thinkers, and lifelong learners. Teachers can communicate with administrators, exchange ideas with other teachers and subject-area experts, and communicate with parents. PBL is not just a way of learning; it's a way of working together. If students learn to take responsibility for their own learning, they will form the basis for the way they will work with others in their adult lives.

http://www.edutopia.org/teaching-module-pbl-why