The School District of Janesville is hosting a job fair this week.  District Public Information Officer Patrick Gasper says they are hiring for full-time and part-time positions, including teachers, paraprofessionals, clerical, custodial, food service, and substitutes.  Certain positions might require a license or certification.  Anyone who is offered employment must get a background check.  The job fair takes place Thursday from 3 to 6 pm, and Friday from 9am to Noon at Marshall Middle School.