Defines a day in session for purposes of a school district's receipt of State school aid.

New Jersey's A1100 bill defines a "day in session" for school districts to qualify for state school aid as a day when school is open, students are under a teacher's guidance during instruction, and the day lasts at least six hours - except for schools enrolling only kindergarten students. School districts must meet this six-hour standard to receive state aid, as the commissioner may withhold aid for non-compliance. The bill amends state law to establish this requirement specifically for state aid calculations, replacing the previous regulatory standard of four hours for general school days.