These threads about Newcastle always make me laugh, yes, get here for one day then immediately leave for somewhere not in Newcastle.
Depends what you want, for history I would be looking at the " New" castle, town walls and the bridges.
Grey Street, theatre royal, Grainger town for architecture.
Victoria tunnel is a good one too.Near the Ouse Burn.
Newcastle is famous for it's drinking culture, I would be visiting the Ouse burn
" scene" but then I am old. Don't touch the Bigg market.
There are a ton of eating establishments.
9am Drinking in the Black Garter is an eye opener if nothing else. Not many students will be trying that.
If you do want to leave Newcastle then Tynemouth and it's priory and beaches are a good shout.
Usual chain shops on Northumberland Street but it's scruffy at the moment.