I get so frustrated with educational research where the
results of a study seem to show one thing, only to be refuted by another study. Is it the nature of education, is it because
of poorly designed studies, is it all idealogically slanted from the get-go?
In speaking of gains in District 2 in NYC Ravitch says “little attention has been paid
to the remarkable economic boon and demographic changes in the district during
the 1990s. These shifts surely influenced
the district’s educational gains.” She
goes on to say there were demographic changes in district 2 that were only
revealed in a census several years later,
and that the proportion of white students went up and African American
and Hispanic went down, and suggests that these changes were the cause of reported educational gains.
While the census may not have documented a demographic
change till years later, the schools certainly knew it immediately. Schools know how many kids are coming in each
day, and they collect and know the demographic groups. When Alvarado’s statisticians went to
calculate the average test scores in various demographic groups (which surely
they did) they knew how many were in each group in 1987 and how many there were
in 1995.
So did Alvarado and the original District 2 researchers suppress
the demographic differences in their reports?
Or is Ravitch casting doubt by “revealing new information,” though the
information surely wasn’t new to the school district.