She had been found guilty of stealing £500,000 from St John Rigby College in Bromley, Kent, at an earlier hearing.
She used the cash to pay for a luxury lifestyle.
She bought loads of designer clothes and make-up, spending a massive £7,000 just on shoes.
She also used the money for posh holidays, including trips on a famous luxury train called the Orient Express.
The school struggled to cope as McCabe kept on spending its money.