Problem-Based Learning encourages students to learn through their own research and by determining which solutions to design and implement to address the problem. They should follow these steps:
In Problem-Based Learning, there is a central focus on collaboration and self-directed learning. Students work together to determine how they will organize their work, establish decision-making processes, and set evaluation criteria for developing solutions. Students are allowed to make mistakes -- and learn from them!
Reference: Nilson, L.B. (2010). Teaching at its best: A research-based resource for college instructors. Jossey-Bass.
In The Seven Step Method to PBL, AALBORG Centre for Problem-Based Learning explores the steps of PBL designed by Maastricht University in the 1970s.