Which provision ensures all children are served under IDEA?

The provision that ensures all children are served under the Individuals with Disabilities Education Act (IDEA) is the concept of Free, Appropriate Public Education (FAPE). This principle guarantees that children with disabilities have access to an educational curriculum that is tailored to their individual needs, at no cost to their families. FAPE emphasizes that all children, regardless of their disabilities, should receive an education that is designed to help them achieve appropriate educational progress.

Under FAPE, schools are required to develop an Individualized Education Program (IEP) for each student with a disability. This IEP outlines specific educational goals, accommodations, and support services necessary for the child to succeed in the general education environment. The aim is to ensure that disabilities do not impede a child's right to a quality education and that all students are suitably served within the educational system.

The other options, while they may relate to inclusive education in some capacity, do not specifically address the fundamental provision under IDEA that guarantees educational access and support for children with disabilities. Therefore, FAPE is the key component ensuring that all eligible children are provided with necessary educational services and support.