Kirksville R 3 Schools are hiring substitutes! We need subs for teachers, paraprofessionals, food service workers, custodians, secretaries, and nurses. Nurse substitutes must have a valid Missouri LPN or RN license. Teacher substitutes must hold an active Missouri Teaching Certificate or Substitute Certificate. Don’t have your sub certificate, yet? Apply today to be a para sub and start working sooner! Once you earn your certificate, you will be giving yourself a $2 an hour raise!