In PISA 2012, student performance in mathematics showed some variations across provinces. Nova Scotia and New Brunswick show smaller differences between high and low performers compared to the national average, while Alberta and Quebec have the largest differences. The impact of socio-economic status on student mathematics performance in Canada (9.4%) is below the OECD average (14%) (Figure 3). Every province and territory has publicly funded pre-primary education for 5-year-olds, and Ontario has full preprimary education provision for both 4-year-olds and 5-year-olds.