Projects and activities are the keys to a better understanding of PBL. They are no longer tasks that students need to finish after a traditionally-taught unit but rather a set of learning experiences and tasks that guide students in inquiry toward answering a central question, solving a problem, or meeting a challenge. Research has clearly proved that projects that are well-designed and based on students experiences improves students motivation to learn, help them see how school connects to the outside world by making learning relevant and meaningful, and promotes greater civic participation and global awareness.
Via Nik Peachey