Premier Mike Baird is promising to spend a billion dollars on giving NSW schools a facelift if voters support his controversial plan to partially privatise the state's electricity assets.

Mr Baird is taking his poles and wires plan to the March election and has pledged to spend the $20 billion it is estimated to raise on infrastructure. As part of that plan, $1 billion will go towards building up to 1600 new or refurbished classrooms and learning spaces throughout…