Are School Factors Important for Measuring Teacher Effectiveness? A Multilevel Technique to Predict Student Gains through a Value-Added Approach

Table 2

Estimation of variance explained, significance, and effect size at teacher and school levels.

Random effect	Variance component	Variance explained	𝑝 value	Effect size
Teacher level effect
Unconditional model	4.500	3.6%	<.0001	0.19
Conditional VAM	4.645	4.6%	<.0001	0.22
School level effect
Unconditional model	0.467	0.4%	.0410	0.06
Conditional model	0.258	0.3%	.1636	0.05