Which IDEA part governs the provision of special education services for children aged 3 through 21?

• A. IDEA Part A
• B. IDEA Part B
• C. IDEA Part C
• D. IDEA Part D

Answer: (B)

For students who are school-aged, the part of IDEA that directly governs special education services is Part B. This section specifically addresses special education and related services for children aged 3 through 21, including how eligibility is determined, how an Individualized Education Program is developed, and how services are delivered in the least restrictive environment. Part C, in contrast, covers early intervention for infants and toddlers from birth through age 2, while Part A contains general provisions and Part D covers national activities and research rather than direct services. So, for children aged 3 through 21, Part B is the applicable part.