What is the Aim of the Decile System?
The decile system is a scoring system used by the Ministry of Education to determine the financial needs of public schools. Each school is assigned a rating between one and ten depending on the percentage of enrolled students from low socio-economic backgrounds. A higher score indicates less students from low socio-economic backgrounds and the school is allocated less funding (Education, 2019).
The decile system was implemented in 1995 with the purpose of distributing government funding in a way which helps to provide extra support to learners from disadvantaged communities. The system aims to give extra support to those who are disadvantaged in order to provide equal opportunities for the success of all students (PPTA, 2013). However, the decile system is commonly misinterpreted as being a reflection of a difference in the quality of the education provided at different schools. Parents often avoid sending their children to lower decile schools in favour for a higher decile, as they believe their child will have better academic success at a higher decile school.
Is Decile Score Synonymous with Quality?
When comparing the average NCEA grades achieved at schools of different decile rates, it is evident that lower decile schools achieve, on average, lower grades than higher deciles schools. However, according to Thrupp and Alcorn (2011) comparing school achievement in a decile-based context is “a case of using available data rather than good data.”
Children from low socio-economic communities face many more obstacles on the road to academic success than children from more privileged backgrounds. As low decile schools have a higher percentage of disadvantaged children than their high decile counterparts, directly comparing the average NCEA results of these schools is to neglect the inequality of preparedness between children of high and low socio-economic status. In order to fairly compare the quality of education provided by each school, one must also take into account the starting position of the students within the school. To compare academic success based on the end point of the child’s education alone would be a gross misrepresentation of the obstacles each child has had to overcome in order to arrive at the destination.
Also, as there is no difference in the level of qualification needed to teach at schools of different decile levels, both high and low decile schools draw their teaching staff from the same pool. This suggests that there is no difference in the quality of teaching between schools of different decile levels (ERO, 2016).
While on the surface it may appear that the decile rate of a school corresponds to student success, this is not a true reflection of the quality of education provided by the school. Therefore, comparing the average NCEA results between school does not fairly represent the quality of teaching or the success of the schools ability to teach the child, instead this difference in achievement highlights the importance of providing additional support to disadvantaged children, as is the aim of the decile system (PPTA, 2013).
References
Education. (2019). School Deciles. Retrieved from https://www.education.govt.nz/school/funding-and-financials/resourcing/operational-funding/school-decile-ratings/
Education Review Office. (2016). High Quality Education and Care – An Overview. Retrieved from https://www.ero.govt.nz/publications/quality-in-early-childhood-services/high-quality-education-and-care-an-overview/
PPTA. (2013). A Hierarchy of Inequality – The Decile Divide. NZPPTA. Document 338. Retrieved from https://www.ppta.org.nz/dmsdocument/338
Thrupp, M., & Alcorn, N. (2011). A Little Knowledge Being a Dangerous Thing?: Decile-based Approaches to Developing NCEA League Tables. New Zealand Annual Review of Education. 20(2010), 52-73. Retrieved from https://www.victoria.ac.nz/education/research/nzaroe/issues-index/2010/pdf/text_thrupp.pdf
