About 640 children from low-income families across the state will be eligible to enroll in free pre-kindergarten classes next year. The news was announced Thursday morning by the state's Executive Office on Early Learning and the Department of Education.  It's part of a push by Governor Neil Abercrombie for universal state-funded preschool. Hawaii is one of 11 states without public preschool. The plan is contingent on $4.5 million in state funding that the Legislature has yet to take up. The income guidelines to qualify for free or reduced-price lunch will be used, meaning a family of four cannot earn more than $50,117 to qualify.