How is the Confidence Interval (C.I.) used in AYP decisions?
Confidence intervals take into account the fact that the students tested in any particular year might not be representative of students in that school across the years. Confidence intervals control for this sampling error or variation across years by "passing" schools or subgroups that come very close to achieving their annual thresholds. In 2004, the United States Department of Education approved a 95% Confidence Interval (C.I.) in Pennsylvania for AYP performance calculations. This policy is consistent with what has been permitted in at least 26 other states. A 95% C.I. can be used for meeting the state proficiency target, while a 75% C.I. can be used for meeting the Safe Harbor target.
How is the Pennsylvania Performance Index (PPI) used in AYP decisions?
The Pennsylvania Performance Index (PPI) measures growth across all levels of the PSSA, not just Proficient and Non–proficient. Since this index shows significant growth including growth at the lowest levels, it is a good indication that low performing schools are building a foundation to meet AYP objectives. PPI can be used by schools and districts to demonstrate significant growth and thereby meet AYP targets. |