Tasmania's submission to a federal inquiry on school funding has been criticised as inadequate by the education union.

The Government has been going through options for the final two years of funding under the Gonski school money deal.

Tasmanian Education Minister Jeremy Rockliff lodged a two-page submission arguing that the state would lose $100 million in education funding for 2018-19 if Gonski reforms were not funded.

The South Australian Government's considerably longer submission included detailed breakdowns on how five specific schools would benefit from Gonski money.

Australian Education Union Tasmanian president Helen Richardson says the Tasmanian submission failed to reflect how badly the island state needed its missing Gonski funding.

“Well, it was certainly very light on detail,” she told the ABC.

“We would have expected to see a much more extensive submission.

“If we don't get the extra funding that brings in extra teachers, literacy support, numeracy support, social workers, speech pathologists, teachers aids, our kids won't have the chance to get the best education possible.”

In his submission, Rockliff did highlight Tasmania’s high level of socio-economic disadvantage.

“There is common agreement that education is the key strategy in overcoming disadvantage, a view that Tasmania strongly supports,” he told reporters.

The Senate Select Committee on School Funding has also heard from representatives of Commonwealth Departments including education and training, and the treasury.