Your child has some words. Not many, but some. She points, she vocalizes, she finds ways to tell you what she needs. When the therapist brought up AAC, you hesitated. She's already working so hard on speech. Won't a device make her stop trying?

That question reflects a fear many parents carry, and it's built on a misunderstanding about what AAC does. Augmentative and alternative communication doesn't replace speech. It supplements it, supports it, and often accelerates it. For children with cerebral palsy, AAC can be the difference between being understood by one or two people and being understood by everyone.

Why Children with Partial Speech Still Need AAC

The gap here is significant. About 80% of children with cerebral palsy have speech delays, but only 57% of children who need AAC have AAC goals in their IEPs. The children most likely to fall through that gap are the ones with partial speech.

When a child has a few words or word approximations, schools and families often assume AAC isn't necessary. The thinking goes: she's already talking, so we just need to work on clarity. But partial speech comes with real limits. Those few words may only be understood by parents or close caregivers. They may not hold up in noisy environments, when the child is tired, or when motor control is compromised by excitement or fatigue.

AAC fills those gaps. A child can use her voice when it works and switch to her device when it doesn't. That's not giving up on speech. That's giving her a backup system so she's never without a way to communicate.

How Motor Function Shapes AAC Choices

Cerebral palsy affects movement, and movement is how we interact with communication tools. The right AAC system for your child depends entirely on what her body can do reliably and independently.

Direct touch: If your child has controlled hand or finger movement, she may be able to use a tablet or dedicated AAC device with a touchscreen. Some systems offer adjustable button sizes and customizable layouts to match fine motor ability.

Eye gaze: For children with limited hand function, eye gaze technology allows them to select words and phrases by looking at them. The system tracks eye movement and activates the selection after a brief focus period. This access method requires head control and the ability to visually attend to a screen, but no hand movement at all.

Switch scanning: If neither touch nor eye gaze is viable, switch scanning presents options one at a time, and the child activates a switch when the desired word or phrase appears. The switch can be operated with any body part the child controls reliably: head, hand, knee, foot. Scanning takes longer than direct selection, but it works when other methods don't.

Partner-assisted scanning: This low-tech option involves no equipment beyond printed boards or books. The communication partner points to options while the child signals yes or no through eye contact, vocalization, or another consistent indicator. It's slower and requires an engaged partner, but it's always available and never runs out of battery.

The evaluation process should test all access methods your child might use, not just the most obvious one. Motor abilities change with growth, fatigue, positioning, and practice. A child who can't reliably touch a screen in the morning might do better after a positioning adjustment or occupational therapy session.

Getting an AAC Evaluation

Start by requesting an evaluation in writing from your child's school district. Under IDEA, schools must evaluate any area of suspected disability that affects educational performance. If your child's communication is limited, that counts.

Send the request to the special education director by email or certified mail. Include the date and keep a copy. The district has a set timeline to respond and, if they agree, to complete the evaluation. If they decline, they must provide a written explanation, and you have the right to dispute that decision.

The evaluation should include a speech-language pathologist with AAC training, but it often helps to involve an occupational therapist as well. OT can assess positioning, fine motor control, and access methods. The two disciplines working together give you a fuller picture of what your child can do and what supports she needs to do it.

Private evaluations are another route. If your insurance covers speech therapy, some plans also cover AAC assessments. If not, some AAC companies and university clinics offer evaluations on a sliding scale or through grant-funded programs. A private evaluation doesn't obligate the school to follow its recommendations, but it gives you documentation to bring to the IEP table.

Selecting the Right System

AAC systems range from no-tech to high-tech, and the right fit for your child may involve more than one.

Communication boards and books: These are printed grids with pictures, symbols, or words. Your child points to what she wants to say, or a partner scans through options. Boards are portable, durable, and immediately available. They work in water, don't require charging, and can be customized for specific activities or environments.

Speech-generating devices (SGDs): These are dedicated AAC devices with voice output. The user selects words or phrases, and the device speaks them aloud. SGDs often have larger vocabularies than apps, customizable voices, and rugged builds designed to withstand drops and spills. Many are funded through insurance or Medicaid because they're classified as durable medical equipment.

AAC apps: Apps like Proloquo2Go, TouchChat, and LAMP Words for Life turn tablets into communication devices. Apps are less expensive than dedicated devices, offer similar functionality, and run on hardware families already own. The tradeoff is durability. A consumer-grade iPad isn't built for the same level of physical demand as a dedicated SGD.

Hybrid systems: Many families use a combination. A dedicated device for school, where durability and reliability matter most. An app on a tablet for home, where the environment is more controlled. A laminated board in the car or pool, where electronics aren't practical.

The key is starting with the vocabulary and access method that match your child's current abilities, with room to grow. A system that's too complex will frustrate her. A system that's too simple will limit her.

How AAC Is Funded

AAC devices and apps are expensive, but there are multiple funding paths.

Insurance: Many private insurance plans and Medicaid cover speech-generating devices when they're deemed medically necessary. The SLP writes a letter of medical necessity documenting your child's communication needs, the evaluation findings, and why the specific device is the appropriate solution. The insurer reviews the request and either approves, denies, or requests additional information. If denied, you can appeal.

IDEA and IEPs: If the IEP team determines that your child needs AAC to access her education, the school district must provide it at no cost to you. The device belongs to the district and stays with your child throughout the school day, but it typically doesn't come home. Some families negotiate for a second device for home use, funded separately, or for the school device to travel between settings.

Medicaid waivers: Many states offer Home and Community-Based Services (HCBS) waivers that cover AAC devices, apps, and training. Waiver programs vary by state, but they often cover what Medicaid and insurance won't, including backup devices and low-tech supports.

Grants and lending libraries: Organizations like the UCP Assistive Technology Fund, 1Voice, and local Lions Clubs offer grants for AAC equipment. Some states and regions also have AAC lending libraries where families can borrow devices for trials before committing to a purchase.

What to Expect During Implementation

Getting the device or app is only the first step. Your child needs time to learn it, and everyone around her needs to learn how to support her in using it.

AAC training should be part of the plan from the start. The SLP who conducted the evaluation can provide direct therapy sessions focused on using the system, modeling how to navigate it, and building vocabulary. But training can't stop there. Teachers, aides, therapists, and family members all need to understand how the system works and how to encourage your child to use it.

Modeling is essential. When you use the AAC system to communicate with your child, you're showing her that it's a real, valid way to talk. Point to words on her board as you speak. Use her device to make a comment or ask a question. The more she sees it in action, the more natural it becomes for her to use it herself.

Expect a learning curve. It takes time to build motor memory for navigating a system, to expand vocabulary, and to shift from requesting needs to making comments, asking questions, and participating in conversation. Progress may look slow at first, but consistency matters more than speed.

When the School Says No

If the IEP team denies an AAC evaluation or declines to provide a device your child needs, you have options.

Request the denial in writing. The district must provide a prior written notice explaining why they refused and what data they used to make that decision. That notice is the documentation you need to file for dispute resolution.

You can request an IEP meeting specifically to discuss AAC. Bring your own evaluation if you have one. Bring research on AAC and CP. Bring examples of how your child's current communication system is failing her. Be specific: she can't answer questions in class, she can't tell the nurse where it hurts, she can't participate in group activities.

If the team still refuses, you can file a state complaint or request mediation or due process. These are formal dispute resolution processes under IDEA. They take time and energy, but they're designed to resolve disagreements when the school won't provide what a child needs.

The Bigger Picture

AAC is not a fallback plan for children who fail at speech. It's a communication system that works alongside speech, giving your child access to language in all the situations where her voice alone isn't enough.

The goal is not perfection. It's connection. It's being able to answer a question, make a choice, tell a joke, say what hurts. AAC makes that possible for children whose bodies limit speech but whose thoughts and feelings deserve to be heard.