Problem Based Learning is a teaching approach manifest learning that has been taken place. The best explanation on this is addressing a problem through investigation, planning, collectingdata then analyzing. One of the examples of this approach is the Science Investigatory project of the student.

Preparing project proposal will present the rationale. Wherein the proponents discuss the reason why theycome up with that proposal.In this way students will explain the reason behind, then they will prepare a product or a procedure that can lessen the impact of the existing problem.These are the pieces of evidence of learning nowadays