Part C to Part B: The Age-3 Transition from Early Intervention to School

What Part C Is

Part C of the Individuals with Disabilities Education Act (IDEA) funds early intervention services for children from birth through age 2. Each state runs its own program, but all are required to meet federal standards. Services are typically provided in the child’s natural environment, which usually means the home or a childcare setting rather than a clinic or school building.

The document that drives Part C services is the Individualized Family Service Plan, or IFSP. Unlike a school-based IEP, the IFSP is centered on both the child and the family. It identifies the child’s current developmental levels, the family’s priorities, and the services and supports that will be provided. The IFSP is reviewed every six months and updated annually. A service coordinator is assigned to guide the family through the process and help connect them to resources.

Part C eligibility is typically based on a developmental delay in one or more areas, including communication, motor, cognitive, social-emotional, or adaptive development. Some states also allow eligibility based on a diagnosed condition that carries a high probability of delay. The threshold for qualifying is generally lower than what school programs require, which is why some children exit early intervention without continuing into school-based services.

What Part B Is

Part B of IDEA covers special education and related services for children ages 3 through 21. This is the law that governs what happens in public schools. The local education agency, or LEA, is responsible for identifying, evaluating, and serving eligible children under Part B. The LEA is almost always the local school district.

The document that drives Part B services is the Individualized Education Program, or IEP. The IEP is child-focused and school-focused. It describes the child’s present levels of performance, the measurable annual goals the team has set, the services to be provided, and the placement. The IEP team includes the parents, the child’s teachers, a special education representative, and other specialists as appropriate.

Services under Part B are provided in an educational setting. Depending on the child’s needs and what the IEP team determines is the least restrictive environment, this might be a general education preschool classroom with support, a specialized classroom, or some combination. The natural environment requirement from Part C does not carry over to Part B.

The Transition Timeline

IDEA requires that transition planning begin no later than 90 days before the child’s third birthday. That means if your child turns 3 in March, planning must begin by December at the latest. A transition conference must be held with participation from both the early intervention team and a representative from the LEA. The purpose of that conference is to review the child’s current status, explain the Part B process, and help the family understand what to expect.

The school district has 60 days from the date it receives signed parental consent to complete an evaluation. If you provide consent in December, the evaluation should be complete by February, leaving time to hold an eligibility meeting and an IEP meeting before the birthday. If you wait until February to give consent, the district may not complete everything in time, and your child could go without services after the birthday cutoff.

North Carolina and South Carolina Specifics

Both states follow the federal 60-day evaluation window from consent. If you are in North Carolina, early intervention is coordinated through the NC Infant-Toddler Program (NC ITP). Your service coordinator will initiate transition planning and refer your family to your local school district’s Exceptional Children’s (EC) program. The EC program handles all Part B evaluations and services for children ages 3 and older. Contact the EC office directly if you have not heard from the district by the time your child reaches 2.5 years.

If you are in South Carolina, early intervention services are coordinated through BabyNet. Transition planning follows the same federal timeline. You will be referred to your local district’s Office of Exceptional Children, which is responsible for Part B evaluations. As in North Carolina, do not wait for the district to contact you. Reach out proactively, confirm that your referral has been received, and get a timeline for the evaluation in writing.

The Eligibility Question: Why Some Children Don’t Qualify

This is the part that catches many families off guard. Qualifying for early intervention under Part C does not guarantee qualifying for school-based services under Part B. The two systems use different eligibility standards.

Part B requires that the child have a disability under one of the categories listed in IDEA. For young children, the most common category is developmental delay, which most states allow from ages 3 through 9. However, each state sets its own criteria for what counts as a developmental delay under Part B, and those criteria are often stricter than what Part C requires. A child who qualified for early intervention with a mild delay in one area may not meet the school district’s threshold for that same category.

Other Part B disability categories include autism, speech or language impairment, intellectual disability, other health impairment, and specific learning disability, among others. The evaluation the school conducts should be designed to determine whether the child meets criteria under any applicable category, not just developmental delay.

The Transition Conference

The transition conference is a required meeting that brings together the early intervention team and a representative from the school district, along with the family. It is not an IEP meeting and it is not an eligibility meeting. Its purpose is to explain the transition process, answer questions, and make sure the family understands what comes next.

Bring copies of your child’s current IFSP, all evaluation reports from early intervention, and any progress notes or summary reports from service providers. These documents give the school team context about your child before the Part B evaluation begins. They do not automatically become part of the school record, but they are useful reference points and you can request that the evaluation team review them.

At the conference, ask the LEA representative to explain the evaluation process, what assessments will be used, who will conduct them, and how long the process typically takes in your district. Confirm the timeline in writing before you leave.

If Your Child Qualifies for Part B

If the evaluation shows that your child meets eligibility criteria under Part B, the team will hold an IEP meeting to develop the initial IEP. IDEA requires that the IEP be in place and services be available on the child’s third birthday, assuming the evaluation is complete before that date. If the family provided consent early enough, this is achievable.

Preschool special education can look different depending on the child’s needs and what the team determines is the least restrictive environment. Options may include placement in an inclusive preschool classroom with itinerant support, a specialized classroom within the school, or a combination. Home-based services may be available in some districts for children who are not yet in a school setting. Review the placement options carefully and ask what the rationale is for each recommendation.

If Your Child Does Not Qualify

When the district determines that a child does not meet Part B eligibility criteria, early intervention services end on the third birthday and school-based services do not begin. The child is not entitled to continued services under either system. This can be a difficult moment for families who have been receiving services since infancy.

Options at that point include private speech, occupational, or behavioral therapy outside of school; a Section 504 plan if the child has a disability that substantially limits a major life activity but does not require specialized instruction; and a re-referral to the school district for a Part B evaluation if the child’s needs increase or a new concern arises. Keep all documentation from early intervention, because it may be relevant if you return to the district for re-evaluation later.

Red Flags in the Transition Process

Most districts handle transitions appropriately, but there are patterns worth watching for. If you see any of the following, ask questions and put your concerns in writing:

• The school has not scheduled the transition conference by the time your child is 2.5 and you have not been contacted.
• The evaluation is not completed before the third birthday despite an early referral and timely consent.
• The eligibility determination is vague or the team cannot clearly explain which category was considered and why the child did or did not qualify.
• The proposed IEP does not reflect what you know about your child’s actual strengths and needs, or the goals are too generic to be meaningful.
• The district pressures you to sign the IEP immediately at the meeting without giving you time to review it.

Parents have the right to request an IEP meeting at any time, the right to an independent educational evaluation at public expense if they disagree with the school’s evaluation, and the right to written prior notice before the district changes, refuses to change, or initiates any service.