Pengembangan Perangkat Pembelajaran Matematika Berbasis Model Problem Based L…

This research produces a product in the form of a mathematics learning device using a Problem Based Learning model on Three Dimensional material to facilitate students' Higher Order Thinking Ability. The development model used is a 4-D model. The research instrument used is the instrument of validity and practicality. The instrument of validity is in the form of a validation sheet to assess the…