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. |