Substitute Teacher Staffing in Illinois

Illinois substitute teacher and clearance requirements

Illinois substitutes hold one of two ISBE licenses. The Substitute Teaching License requires a bachelor's degree, or 90 credit hours in an approved educator preparation program, and allows up to 90 consecutive paid school days per licensed teacher. The Short-Term Substitute Teaching License requires an associate's degree or 60 credit hours and is limited to five consecutive days per teacher. Every substitute passes a fingerprint-based Illinois State Police and FBI check.

The Substitute Teaching License and the 90-day limit

The School Code provides: "Applicants for a Substitute Teaching License must hold a bachelor's degree or higher from a regionally accredited institution of higher education or must be enrolled in an approved educator preparation program in this State and have earned at least 90 credit hours." It also sets the long-assignment ceiling for fully licensed teachers who substitute: "A substitute teacher who holds a Professional Educator License or Educator License with Stipulations shall not teach for more than 120 school days for any one licensed teacher under contract in the same school year" (source: 105 ILCS 5/21B-20, Types of licenses). ISBE's substitute page states the general rule for substitute licensees — "Cannot teach more than 90 consecutive paid school days per licensed teacher in the same school year" — and notes that "Substitute licenses are valid for 5 years, and may be renewed with the payment of registration fees" (source: ISBE, Substitute Licenses). ISBE's licensure application page lists the Substitute Teaching License fee at $50 and the Short-Term license at $25, and warns that "The license is not valid for employment until these fees are paid" (source: ISBE, Licensure Application Process).

The Short-Term Substitute Teaching License and the five-day rule

The School Code states that "Applicants for a Short-Term Substitute Teaching License must hold an associate's degree or have completed at least 60 credit hours from a regionally accredited institution of higher education," and it draws the scheduling line: "For teacher absences lasting 6 or more days per licensed teacher who is under contract, a school district may not hire an individual holding a Short-Term Substitute Teaching License" (source: 105 ILCS 5/21B-20). ISBE adds that "All districts utilizing short-term substitute teachers must provide the teachers with a training prior to employment" (source: ISBE, Substitute Licenses). For vacant positions, the Code allows a district to employ a substitute "for no longer than 30 calendar days per each vacant position in the district if the district notifies the appropriate regional office of education within 5 business days," with extensions available on request. We record license type for every sub and schedule against these limits automatically.

Fingerprint-based criminal history checks

Section 10-21.9 of the School Code requires applicants for school employment to authorize a fingerprint-based criminal history records check, and provides that "The Illinois State Police and the Federal Bureau of Investigation shall furnish, pursuant to a fingerprint-based criminal history records check, records of convictions" to the school board, along with checks of the Statewide Sex Offender Database and the Statewide Murderer and Violent Offender Against Youth Database. A substitute seeking work in multiple districts may authorize the check through the regional superintendent (source: 105 ILCS 5/10-21.9, Criminal history records checks). FocusedEDU completes the check and keeps the result on file before a substitute is presented.

Where we staff in Illinois

We staff substitute programs for districts, charter schools, and regional offices of education across Illinois, from Chicago and its collar counties to the state's downstate hubs.

That includes Chicago and the suburbs served by its largest districts — Elgin and School District U-46, Aurora and Naperville (Indian Prairie and Naperville 203), Plainfield, Algonquin, Oswego, Schaumburg, and Romeoville — along with Rockford, Springfield, and Peoria. Because we work with one client per region, the first district or charter network to sign in a metro gets the substitute pool we build there.

Proof: a 95% day-to-day substitute fill rate at Odyssey

A substitute partner should be judged on day-to-day fill rate. Our reference point is an existing client: Odyssey Public Charter School in Wilmington, Delaware, a 1,000+ student K-8 school where our weekly-pay, app-based substitute model sustains a 95% day-to-day fill rate, a 40%+ improvement over the school's previous provider.

Odyssey Public Charter School in Wilmington, Delaware serves more than 1,000 K-8 students drawn from five districts and protects a 12:1 student-teacher ratio. When the agencies already under contract could not fill its open roles, Odyssey brought in FocusedEDU in 2021. Since then we have made 120+ placements across 13+ distinct role types — substitute and certified teachers, SLPs, OTs, PTs, psychologists, reading specialists, one-on-one aides, paraprofessionals, bus drivers, and support staff — and day-to-day substitute coverage runs at a 95% fill rate, a 40%+ improvement over the previous provider.

The mechanics behind that number are the same ones we bring to every substitute program: weekly Friday pay by direct deposit or Cash App, a mobile app where vetted subs pick up and swap shifts the moment an absence posts, and a pool recruited for one client's buildings instead of rented to every school in the county. Read the full Odyssey Public Charter School case study.

For substitutes looking for work in Illinois

Substitutes who work with FocusedEDU in Illinois are paid weekly, every Friday, by direct deposit or Cash App, and choose their own shifts in a mobile app. One application puts you in front of the partner schools we staff, and our team walks you through every clearance and credential step.

You will need an ISBE Substitute Teaching License (a bachelor's degree, or 90 credit hours in an approved preparation program) or a Short-Term Substitute Teaching License (an associate's degree or 60 credit hours), plus a fingerprint-based ISP and FBI check. We walk you through ELIS, the fees, and the district training the short-term license requires. Browse current openings and apply on our candidates page. Long-term substitutes who prove out in a building can be hired permanently by the school with no conversion fee, which is why a FocusedEDU leave coverage is often the best teaching interview a substitute ever gets.

Need substitute teachers in Illinois?

Start with a free 30-minute discovery call or send your openings by email. Either way we map your absence volume, buildings, and requirements first, then build a substitute pool that serves your schools alone — one client per region, temp-to-perm at no cost.

Book a discovery call or send a staffing request. Prefer to compare first? Read our breakdown of the best substitute teacher staffing agencies for 2026, or go back to substitute teacher staffing for K-12 schools.