From USDA.gov:

Schools send school meal applications home at the beginning of each school year. However, you may apply for school meals any time during the school year by submitting an application directly to your school or district (link below). If you're earning at or below current Income Eligibility Guidelines, you are encouraged to contact your school or district to fill out a school meal application. Applications are reviewed by local school or district officials before granting free or reduced price benefits. All personal information is kept strictly confidential. If you receive Supplemental Nutrition Assistance Program benefits, all of your children who attend school automatically qualify for free school meals. Participation in other federal assistance programs, including Temporary Assistance for Needy Families (TANF) also provides automatic eligibility. Please contact your school to determine if you need to fill out an application.

If you are eligible for unemployment compensation or The Special Supplemental Nutrition Program for Women, Infants, and Children (WIC), you may also be eligible for free or reduced price school meals. State Workforce Agency Administrators should let households seeking unemployment benefits about the availability of free and reduced price school meals. Please contact your school or district for more information.

Free, reduced, and paid status applies to Breakfast and Lunch. Southeast of Saline also applies this status to school enrollment fees. All personal information is kept strictly confidential.

USD306 School Meal Online Application
USD306 School Meal Paper Application

Link to Additional Documents.

School Lunch Program Documents