Twice as many voters in Liberal-held marginals seats would support the Turnbull government fully funding the Gonski schools package as those who oppose spending the extra $4.5 billion.

Polling of more than 6000 voters across 10 marginal seats, all held by government MPs, found 49.7 per cent of people would back the government reversing its decision not to fund the final two years of the Gonski agreement.

School funding will continue to be a hot political issue. Credit:AFR

More people were unsure than actively opposed the government putting extra pressure on the budget bottom line by funding the outer years of Gonski (28.9 per cent versus 21.5 per cent).

Gonski became a key 2016 election battleground last week when Opposition Leader Bill Shorten pledged to pump the $4.5 billion needed to fully fund the six-year agreement if Labor reclaims office.