You'd need to be a qualified teacher, johnnyboy, and you'd have to have maybe eight years experience to get close to that sort of salary. If you were just starting out you'd get significantly less.
The alternative is to become a 'cover supervisor', for which the pay rates are lower.
And, of course, as it's supply work you may sometimes have to have days or weeks unpaid between assignments, be prepared to travel (unpaid) to different places every day, and cope with the many unco-operative students who try to take advantage of cover supervisors/supply teachers.