Table 1:

Description of experimental design

1	2	3	4	5	6	7	8	9	10
Grantee and sample size	Site	Treatment Curriculum	Control Curriculum (a)	Whole school randomized to same Treatment?	Some within-school randomization to treatment?	Children randomized across treatment conditions within school?	Total number of schools (clusters)	Number of schools, classrooms, students, if school randomization (T/C)	Number of classrooms and students, if within-school randomization (T/C)
I. Literacy vs. HighScope and Creative Curriculum
University of North Florida  School n= 27;  Classroom n= 27;  Child n=210	FL	Early Literacy and Learning Model	Creative Curriculum	Y (same elementary school shared same treatment status)	N	N	72	14, 14, 120 13, 13, 90
Florida State University  School n=11;  Classroom n=19;  Child n=200	FL	Literacy Express	HighScope	Y	N	N	5, 10, 100 6, 9, 100
Florida State University  School n=12;  Classroom n=20;  Child n=200	FL	DLM Early Childhood Express supplemented with Open Court Reading Pre-K	HighScope	Y	N	N	6, 11, 100 6, 9, 100
University of California-Berkeley  School n= 17;  Classroom n=39;  Child n=260	NJ	Ready Set Leap	HighScope	N	Y	N		21, 120 18, 140
University of Virginia  School n=5;  Classroom n=14;  Child n=200	VA	Language Focused	HighScope	N	Y	N		7, 100 7, 100
II. Literacy vs. Locally-Developed Curriculum
University of Texas  Health Science Center at Houston  School n=12;  Classroom n=28;  Child n=190	TX	Doors to Discovery	Locally Developed	Y	N	N	41	8, 14, 100 4, 14, 90
University of Texas Health Science Center at Houston  School n=10;  Classroom n=30;  Child n=200	TX	Let’s Begin with the Letter People	Locally Developed	Y	N	N	7, 15, 100 4, 15, 90
Vanderbilt University  School n=13;  Classroom n=14;  Child n=200	TN	Bright Beginnings	Locally Developed	Y	N	N	7, 7, 100 6, 7, 100
III. Math vs. HighScope and Creative Curriculum
University of California-Berkeley and SUNY University of Buffalo  School n=36;  Classroom n=40;  Child n=300	CA and NY	Pre-K Mathematics supplemented with DLM Early Childhood Express (Math Software only)	Creative Curriculum or HighScope	N	Y (but in separate buildings)	N	36	19, 20, 150 17, 20, 150
IV. Creative Curriculum vs. Locally-Developed Curriculum
University of North Carolina at Charlotte  School n=5;  Classroom n=18;  Child n=170	NC and GA	Creative Curriculum	Locally Developed	N	Y	Y	17		9, 90 9, 80
Vanderbilt University  School n=12;  Classroom n=14;  Child n=210	TN	Creative Curriculum	Locally Developed	Y	N	N	6, 7, 90 6, 7, 100

Note: Ns are rounded to the nearest 10 in accordance with NCES data policies.