The leaders are debating the issue of North Sea Oil.
Alex Salmond says that "every other country in Europe would give their back teeth to have North Sea Oil".
Alistair Darling argues that it is risky to rely on a source of revenue that is very volatile, saying that Salmond is "gambling our children's future".
More top news
Can the First Minister measure up in bid to close to attainment gap?
Monday proves a brighter, colder day than Sunday. One or two showers pushing in and turning wintry over the hills inland
Emma Jesson brings you Sunday night's forecast