Which principle in IDEA ensures that all children have access to public education irrespective of disability?

The principle that ensures all children have access to public education, regardless of disability, is encapsulated in the concept of Free and Appropriate Public Education (FAPE). This principle is a foundational aspect of the Individuals with Disabilities Education Act (IDEA), which mandates that public schools provide educational resources and supports to students with disabilities. Under FAPE, every child with a disability is entitled to an education that meets their individual needs at no cost to the family, which is crucial for promoting equitable access to education.

FAPE is not only about providing education but also focuses on delivering it in a way that is appropriate for the student's unique circumstances and educational requirements. This aligns with the goals of IDEA, which aims to ensure that children with disabilities can achieve meaningful academic and developmental outcomes alongside their peers.

In contrast, the other options represent different aspects of IDEA but do not specifically denote the overarching guarantee of educational access. The full inclusion model emphasizes the integration of students with disabilities into general education classrooms, but it does not solely define the principle of access. Related services refer to support services that assist students in benefiting from their educational program, while procedural due process ensures that the legal rights of students and families are protected but does not directly address access to education itself.