Table 11.

Final cluster centers of k-means when k = 3 is used.

	Cluster
	C1 (sufficient) n = 7	C2 (good) n = 29	C3 (excellent) n = 47
Learning Outcomes: Development of Project-Based Learning	2.00	2.11	2.30
Learning Outcomes: Presentation of Project-Based Learning	1.53	1.84	1.95
Learning Outcomes: Self-Evaluation Quizzes	1.53	1.95	2.33
Learning Outcomes: Total	7.04	8.29	9.13