Table 2. Properties of the clusters.

Cluster	Count	TC	AL	PP	Age	Gender	Marital	NYP
1	88	4.49	4.52	4.84	44.92	0.38	0.75	10.89
2	63	4.29	3.98	4.17	46.25	0.57	0.84	11.62
3	21	3.26	4.32	4.56	46.00	0.48	0.52	13.21

Mean values per cluster (TL = teacher-centered, AL = active-learning, PP = professional practice). Gender = proportion males, Marital = proportion not single, NYP = average number of years in professional practice