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Furore over 'inaccurate' schools index ANNA PATTY
April 18, 2010
PUBLIC school principals have identified flaws in the way the federal government compares school performance and social disadvantage on its My School website.
The comparison will help dictate the way all schools – private and public – are funded in the future.
Federal Education Minister Julia Gillard said data from the My School website would be used in measuring the funding needs of schools from 2013.
Independent analysis commissioned by The Sun-Herald shows that the government's measure of social disadvantage is broadly accurate in determining how well schools perform in the NAPLAN tests. However, high school principals and teachers have criticised the use of the index of community socio-educational advantage (ICSEA) as a basis for like-school comparisons, because it has directly compared small schools in remote areas with large city high schools.
Acting president of the NSW Secondary Principals Council Andrew Newman said ICSEA was "a reasonable indicator" of school performance at a statewide level, but it was not an accurate measure of the level of educational social disadvantage at individual schools. School enrolment data, examined by the council, provided a more accurate measure than the broader census district data used in calculating the ICSEA.
"Not all kids from the same census district go to the same school," Mr Newman said.
The government was forced to adjust ICSEA rankings for 7 per cent, or about 650, of the nation's 9509 schools before launching the My School website in January after it was found that census data was not reliable for those schools.
The Secondary Principals Council has identified schools that had their ICSEA changed by as many as 285 points.
Based on census data, the My School website originally gave Granville South High School an ICSEA rank of 995. This was changed to 710 based on the profile of its enrolled students.
"Julia Gillard needs to ask all schools the same question to get a much more accurate picture of the ICSEA," Mr Newman said.
The analysis for The Sun-Herald shows that when average scores of school test results from NAPLAN are plotted against the school's index of social disadvantage, most perform as well as expected.
Schools that performed well above their level of social disadvantage included academically selective high schools such as James Ruse Agricultural High, St George Girls and North Sydney Boys.
NSW Greens MP John Kaye said the spread of NAPLAN results for a given level of socio-economic index suggested the ICSEA rank was not a good predictor of test score outcomes for primary schools.
http://www.smh.com.au/national/e ... -20100417-slgu.html |
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