Primary education in Australia is compulsory and comprises of 7 years, known as pre-Year 1 to Year 6, starting from the age of 6. While the education system is similar across the country, there are minor variations in the curriculum between the various states and territories, most notably in South Australia where the duration of their primary education is 8 years and conclude at the end of Year 7 instead. Primary education in Australia predominantly focuses on the development of essential literacy, numeracy and social skills of children.