The Baird government will turn to private investors to boost funding for preschool education and open adoptions.

NSW lags behind other states and fails to meet the national goal of all children attending 15 hours of preschool a week in the year before school.

Only 74 per cent of four-year-olds attended a preschool in NSW, compared to 95 per cent nationally.

Of the NSW four-year-olds that did attend a preschool program, only 60 per cent attended for 15 hours or more a week, according to the Productivity Commission. This was well below the 85 per cent attending nationally.