GRAND ISLAND, Neb. (AP) — A central Nebraska school district is doling out inventive pay to persuade local substitute teachers to work for the district instead of other area schools.

Grand Island Public Schools’ incentive program went into effect retroactively on Nov. 1.

Wayne Stelk is the district’s executive director of human resources. He says teachers will receive a $150 incentive in addition to the regular substitute pay if they work a minimum number of days each month.

The requirement varies each month depending on holidays, semester breaks and other factors. The requirement ranges from 12 days in December and May to 18 days in April.

Stelk says there’s no sliding scale to compensate teachers who don’t work the minimum amount.

The program is expected to cost the district about $26,000 this school year.