Throwing more money at under-performing schools will not necessarily improve educational outcomes, says Kevin Donnelly.Deputy Prime Minister Julia Gillard suggests that the key to overcoming the disadvantage experienced by many government school students is to have a more equitable system of funding, based on the current socio-economic status (SES) formula used for non-government schools. This is smart politics on her part.Around Australia, teachers are agitating for more pay, and ALP state gove…