Table 4.

Moderation by Classroom and School Factors in the Head Start Impact Study: Kindergarten Language and Literacy Composite Scores

	(1)	(2)	(3)	(4)	(5)	(6)
	Full-Day Kindergarten	Kindergarten class size	Classroom-level poverty (% FRPL eligible)	School-level poverty (% FRPL eligible)	School % Students Proficient in Reading	School % Students Proficient in Math
Treat	−0.21*	−0.34	−0.09	−0.27	−0.24	−0.30
	(0.10)	(0.29)	(0.19)	(0.20)	(0.15)	(0.20)
Full-day K	0.18
	(0.13)
Treat * Full-day K	0.21
	(0.16)
Class size		0.01
		(0.01)
Treat* Class size		0.01
		(0.01)
Classroom % FRPL			0.02
			(0.25)
Treat* Class % FRPL			−0.30
			(0.26)
School % FRPL				0.26
				(0.29)
Treat* School % FRPL				−0.50+
				(0.29)
School % reading proficient					0.00
					(0.00)
Treat* School % reading proficient					0.00
					(0.00)
School % math proficient						0.00
						(0.00)
Treat* School % math proficient						0.00
						(0.00)
Observations	1008	971	777	898	927	928

Note: Coefficients, and standard errors in parentheses, presents the results for models similar to those presented in Table 3a that test for moderating effects of the column name in the HSIS. Standard errors clustered at school level (in parentheses). All models include fixed effects for center of random assignment and are weighted using inverse probability of treatment weights to adjust for differential attrition and complex sampling. Weights include all the baseline child and family control variables. Changes in observation counts across models reflect changes in teacher survey item non-response. FRPL-Free and Reduced-price lunch.

⁺p < .10;

^*p < .05;

^**p < .01.