WWC Summary of Evidence for this Intervention
Head Start is a national, federally-funded program that provides services to promote school readiness for children from birth to age 5 from predominantly low-income families. These services are provided to both children and their families and include education, health and nutrition, family engagement, and other social services. Head Start program administrators are given the flexibility to design service delivery to be responsive to cultural, linguistic, and other contextual needs of local communities, leading to considerable variability in the services offered. Head Start service models also vary according to family needs, such that children and families may be served through center-based or family child care, home visits, or a combination of programs that operate full or half days for 8–12 months per year.
A group of closely related outcomes.
The number of studies that met WWC design standards and provide evidence of effectiveness. Selecting an item below will display all studies that met WWC design studies in the domain. Selecting a study citation will take you to more information on that study and its findings.
For more, please see the WWC Glossary entry for study rating.
Grades of the students examined in the studies that met WWC design standards, which may not reflect the full range of grades for which the intervention may be used.
The number of students included in the studies that met WWC design standards.
An indicator of the size of the effect from using the intervention. It is the expected change in percentile rank for an average comparison group student if the student had received the intervention, ranging from -50 to +50. At the domain level, the improvement index is only shown if the effectiveness rating is positive, potentially positive, potentially negative, or negative; dashes are displayed for mixed or no discernible effects. At the study level, the improvement index is only shown if the findings are characterized as statistically significant or substantively important (greater than +10 or less than -10); dashes are displayed for an indeterminate effect.
For more, please see the WWC Glossary entry for improvement index.
The indicator represents the highest level of similarity found between your students and each of the high-quality studies of the intervention. Three filled in ovals indicates that at least one study that met standards was conducted on students very similar to yours. Clicking on the indicator for a study will provide information on the similarity for each of the characteristics you selected.