Why participation matters
Every NAPLAN score on MySchool is paired with a participation rate. A school with a 95% participation rate is reporting on a near-complete cohort. A school with a 65% rate may be reporting only the students most likely to sit the test, which can flatter or distort the average in either direction.
The chart below shows the mean Year 5 school-level participation rate per state, year by year. The dashed-style line on each chart is the national mean reported alongside each NSW / VIC / QLD / WA figure for context.
NSW — Year 5 participation
VIC — Year 5 participation
QLD — Year 5 participation
WA — Year 5 participation
What to do with this
When you compare two schools' NAPLAN scores, also check both schools' participation rates. MySchool publishes them on every results page. A 50-point gap between two schools means something different if one has 95% participation and the other has 65%.
For a primer on reading NAPLAN scores together with their context (similar-schools average, year-on-year change, ICSEA), see our NAPLAN reading guide.
Frequently asked questions
Is low participation always a bad signal?
No. A low rate can reflect benign causes like absences or local disruption. The more useful interpretation is comparative: if two otherwise similar schools have persistently different participation rates, it becomes more reasonable to treat that as relevant context when reading their published scores.
Were students “encouraged out” of NAPLAN?
There is no public dataset here that can prove intent. What this page can support is a narrower point: participation rates have changed over time, and that change affects how confidently we should interpret school-level score comparisons.
Why isn’t 2020 shown?
NAPLAN was cancelled nationally in 2020 due to COVID-19, so there is no school-level participation series to plot for that year.