Your child turns 3 in a few months, and someone from early intervention just mentioned a "transition conference." You've spent the last year or two building routines around home visits, family goals, and a team that knows your child. Now you're hearing that everything changes at age 3, and you're not sure what that means for the services your family relies on.

Here's what's happening. Part C of IDEA covers early intervention from birth to age 3. Part B covers preschool special education from age 3 through high school. They're separate programs with different eligibility rules, different service structures, and different goals. Your child doesn't automatically move from one to the other. They have to be evaluated and re-qualify under a new set of criteria, and that process starts at least 90 days before their third birthday.

This isn't a paperwork formality. It's a real shift, and understanding it before the conference gives you time to prepare.

When the Transition Timeline Starts

Federal law requires your early intervention team to begin transition planning no later than 90 days before your child's third birthday. This isn't optional, and it's not something you need to request. Your service coordinator should notify you and schedule a transition conference that includes both your early intervention team and a representative from your local school district.

If you haven't heard anything and your child is approaching 2 years and 9 months old, reach out to your service coordinator directly. The 90-day window exists to give everyone time to complete evaluations, hold meetings, and implement services before early intervention legally ends on your child's birthday.

Mark the date. Services under Part C stop on the day your child turns 3, regardless of where you are in the transition process. If the school district hasn't completed its evaluation or finalized an IEP by then, your child may experience a gap in services. That gap is avoidable if the timeline is followed.

What Changes Between Part C and Part B

Early intervention is family-focused. The Individualized Family Service Plan outlines not just what your child needs, but what your family needs to support your child's development. Services often happen in your home or in natural settings like daycare. The emphasis is on helping your family help your child.

Preschool special education is child-focused. The Individualized Education Program centers on your child's educational needs and what specialized instruction they require to access learning alongside their peers. Services typically happen in a school setting, though related services like speech or occupational therapy may continue.

This isn't a loss, but it is different. You're moving from a system designed to support the whole family to one designed to support your child's education. The relational warmth of early intervention often shifts to a more structured, school-based model. Parents who understand this ahead of time adjust more easily than those who expect the same level of family-centered support to continue.

How Eligibility Criteria Change

Part C eligibility is broad. A child qualifies if they have a developmental delay in one or more of five areas (cognitive, physical, communication, social-emotional, or adaptive) or if they have a diagnosed condition with a high probability of developmental delay. Many states use a threshold of 25% delay in one area or a smaller delay across multiple areas.

Part B eligibility is narrower. Your child must have a disability that adversely affects their educational performance, and they must need specialized instruction to make progress in school. The disability categories are specific: autism, developmental delay, speech or language impairment, intellectual disability, and others. A developmental delay alone may not be enough unless the school district determines it's significant enough to require specialized instruction.

This is where families get caught off guard. A child who qualified for early intervention because they were slightly delayed in two areas may not meet the higher bar for preschool special education if their delays have lessened or don't impact their ability to learn in a classroom setting. The good news is that the evaluation process gives you the chance to document not just what your child can do, but what supports they need to do it.

What Happens at the Transition Conference

The transition conference brings together your early intervention team, the school district representative, and you. The purpose is to review your child's current progress, discuss what evaluations the school district will conduct, and outline the next steps.

Come prepared. Bring copies of recent evaluations, therapy reports, and your current IFSP. Write down specific examples of what your child struggles with in real settings: following multi-step directions, transitioning between activities, communicating needs, playing with peers. The school district will conduct its own evaluation, but your observations carry weight. You know what your child does at home, in the community, at daycare. Share that.

Ask what the timeline looks like. When will evaluations be scheduled? When will results be shared? When will the IEP meeting happen? You want the IEP finalized before your child's third birthday so there's no gap in services.

This meeting is also your chance to ask about placement options. Some districts offer inclusive preschool programs where children with and without disabilities learn together. Others have specialized classrooms. Ask what's available, how decisions are made, and what your role is in that process.

If Your Child Doesn't Qualify for Part B

This happens more often than parents expect, and it doesn't mean your child no longer needs support. It means the school district has determined they don't need specialized instruction to access education at this stage.

You have options. Community preschools, Head Start, and Early Head Start programs can provide structure, peer interaction, and early learning experiences. Some children who don't qualify for an IEP may still qualify for a 504 plan if they have a diagnosed condition that affects a major life activity. A 504 plan doesn't provide specialized instruction, but it can outline accommodations like preferential seating, extra time, or modified assignments.

If you disagree with the school district's evaluation, you can request an independent educational evaluation at the district's expense. This is a formal process with specific timelines and requirements, but it's an option if you believe the evaluation didn't capture your child's needs accurately.

You can also request re-evaluation later. Developmental delays don't follow a straight line. A child who doesn't qualify at age 3 may qualify at age 4 or 5 if new challenges emerge or delays become more pronounced in a school setting.

What You Can Do Now

If your child is younger than 2 years and 9 months, start documenting. Keep a running list of what your child struggles with, what strategies work, and what doesn't. Take videos if it helps. When the transition conference happens, you'll have concrete examples ready.

If you're already in the 90-day window, make sure the school district has scheduled evaluations and you know when results will be shared. Don't wait for someone to follow up with you. Follow up with them.

If your child has already aged out and you're navigating the gap, contact your school district's special education office directly. Ask about Child Find, the district's obligation to identify and evaluate children who may need special education services. You can request an evaluation even if the transition process didn't go smoothly the first time.

The transition from Part C to Part B is a system change, not a judgment on your child's progress. Families who understand the timeline, the eligibility shift, and their options move through it with less disruption. You've spent two or three years learning how to support your child. That knowledge doesn't disappear at age 3. It just shows up in a different setting.