ABSTRACT
Disaggregation provides powerful information in the analysis of school
variables, test scores, and questionnaire results. Schools need to
disaggregate their important student achievement, perceptions, and
school process data by demographic variables that impact student
learning to understand all aspects of the population of the school, and
enable them to look for problems and root causes. For No Child Left
Behind (NCLB), schools must disaggregate their student achievement
results by:
ethnicity/race
indicators of poverty
English language proficiency
special education disabilities
Disaggregation helps us understand if we are truly meeting the purpose
and mission of our school. If we are acting on the belief that all students
can achieve, any breakdown of subgroups of students should show few
differences. Disaggregation also helps us find subgroups that are not
responding to our processes in the way that others are-enabling us to
understand why and to search for new processes so all students can learn.
It is best to disaggregate for few rather than many subpopulations at a
