Accelerated middle schools were found to have potentially positive effects on staying in school and positive effects on progressing in school.
Accelerated middle schools are self-contained academic programs designed to help middle school students who are behind grade level catch up with their peers. The program aims to ensure students stay in school and graduate by encouraging them to begin high school with other students their age. The programs serve students who are one to two years behind grade level, giving students the opportunity to cover an additional year of curriculum over 1–2 years in the program. Accelerated middle schools can be structured as separate schools or as schools within a traditional middle school.
A summary of the effectiveness of an intervention in an outcome domain, based on the quality of research, the statistical significance of findings, the magnitude of findings, and the consistency of findings across studies.
Effectiveness Rating Key
Positive: strong evidence that intervention had a positive effect on outcomes.
Potentially Positive: evidence that intervention had a positive effect on outcomes with no overriding contrary evidence.
Mixed: evidence that intervention’s effect on outcomes is inconsistent.
No Discernible: no evidence that intervention had an effect on outcomes.
Potentially Negative: evidence that intervention had a negative effect on outcomes with no overriding contrary evidence.
Negative: strong evidence that intervention had a negative effect on outcomes.
For more, please see the WWC Glossary entry for rating of effectiveness.
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 percent of each characteristic is based on the sample size of all studies meeting standards that reported data on the characteristic.