Authorities say School Board President Marie Munn and two others with connections to the district signed up their children for a free lunch program even though they didn't meet income guidelines.
The state Attorney General's Office says the theft cost the district $7,000 over five years.
Besides Munn, the husband of the district's head of custodians and the ex-wife of a school principal were arrested in their homes Monday morning.
They could face five years in prison if they're convicted.
