Which of the following best describes an IEP?

An Individualized Education Program (IEP) is a legally binding document that is designed to meet the unique educational needs of a child with a disability. It outlines specific learning goals, the services the child will receive, and how progress will be measured, ensuring that the child has access to an appropriate education tailored to their individual requirements. The IEP is developed collaboratively by a team that includes educators, specialists, and the child's parents or guardians, ensuring that all aspects of the child's education and support are considered.

The other options, while related to education, do not capture the specific purpose and legal requirements of an IEP. For example, a collaborative classroom environment focuses on interaction among students and does not detail an individual student’s educational plan. A standardized test for all students assesses general academic performance but does not address the customized approach necessary for students with disabilities. A teacher's lesson plan may include various teaching strategies but does not specifically outline a tailored program or goals for a particular student with special needs. Thus, the correct answer accurately reflects the nature and function of an IEP.