I am having a hard time understanding the inference and interpretation of this data. And, would p < .01?

Table 1. Correlations and Descriptive Statistics for Teaching Efficacy, Number of Students in the Classroom, and Years of Teaching Experience

	1	2	3
1. Teaching Efficacy
2. Number of Students in Classroom	-0.897
3. Years of Experience	0.365	-0.306
M	3.167	18.222	10.500
SD	1.425	5.694	6.280
Scale Min/Max Values	1 to 5	9 to 30	1 to 24

Note: n = 18.