Core vocabulary in AAC is the small set of high-frequency words that work across almost any topic or setting, words like want, more, go, stop, help, like, and that. A few hundred of these core words make up most of what any of us says in a day, which is why they give an AAC user the widest communication reach from the fewest words. This guide walks speech-language pathologists through what core vocabulary is, how to choose first words, how to organize them on a QuickTalker Freestyle™ speech device, and how to model them so they take hold. If you are setting up a brand-new communicator, this pairs naturally with how to get started.
Key Takeaways
- Core vocabulary is the small set of high-frequency words (go, want, more, help, like, stop, that) that work across almost any topic, while fringe vocabulary covers the specific nouns and names tied to one activity.
- A few hundred core words make up the majority of what any of us says day to day, so core words give an AAC user the widest reach from the fewest words.
- A robust core display works best when it is available from the start, even while partners model just a handful of words at first.
- Keeping core words in the same location supports motor learning, so an AAC user finds a word by the path their hand takes rather than searching the screen.
- Aided language stimulation, modeling core words on the AAC user’s own device during real routines, is the strategy that helps those words take hold.
- An app-agnostic device lets you pick the AAC app whose core word layout fits the user best, and switch later on the same hardware as the user grows.
What Is Core Vocabulary in AAC?
Core vocabulary in AAC is the set of high-frequency words that show up in nearly every conversation, no matter the topic. These are words like I, you, go, stop, want, more, help, like, not, here, and that. They are mostly pronouns, verbs, descriptors, and small connecting words rather than nouns. On their own they may look plain, but together they carry the structure of almost everything we say.
The reason core words matter so much is reach. Research on everyday talk has long found that a few hundred high-frequency words account for most of what we produce across settings. A toddler asking for more, a teenager saying I don’t want that, and an adult saying let’s go are all leaning on the same small core. For an AAC user, a strong core gives them the same flexibility: a handful of words that recombine into thousands of messages.
Core vocabulary also supports the four areas of communicative competence in AAC, especially the linguistic side. When an AAC user has reliable access to core words, they can comment, request, direct, refuse, and ask questions, rather than only labeling what is in front of them. The American Speech-Language-Hearing Association’s practice portal on AAC frames effective AAC as supporting communication across many functions and partners, and a robust core vocabulary is what makes that range possible.
Core Words vs Fringe Words
Core words work everywhere; fringe words make a message specific. Core vocabulary is the high-frequency set that carries conversation across topics, while fringe vocabulary is the topic-specific words tied to one activity, such as names, places, foods, animals, and favorite characters. Both matter, and a good AAC system holds room for each.
Here is the quick contrast:
- Core words: high-frequency, flexible, and reusable. They work at breakfast, at recess, in the car, and in the bath. A child who has more, go, stop, want, and help can communicate in almost any moment.
- Fringe words: specific and personal. Dinosaur, grandma, pizza, trampoline, and the name of a favorite show give a message its detail. Fringe words change constantly depending on the activity and the AAC user’s interests.
The two work together. A message like I want more pizza uses three core words (I, want, more) and one fringe word (pizza). When you plan an AAC user’s vocabulary, you are really planning both layers: a stable core that is always available, and a growing set of fringe words that follows the user’s world. Fringe words are often the easiest to personalize, and they are a natural place to bring families in, since the people, foods, and places that matter most to a child live at home.
Why Do Core Words Come First?
Core words come first because they unlock the most communication for the least navigation. Since a small core covers most of daily talk, an AAC user who can reach core words can say a great deal right away, long before a system holds hundreds of specific nouns. Building outward from a strong core gives the AAC user range from the very beginning.
Core words also generalize. A noun like bubbles is useful at the bubble table and almost nowhere else, while more, again, stop, and all done travel to every activity in the AAC user’s day. Teaching a core word once pays off across dozens of settings, which is an efficient use of the limited time an SLP and family have together.
“He could never tell others what he wanted and now he can at the push of a button.” — AbleNet parent testimonial
There is one more reason to lead with core: it keeps the focus on communication rather than just labeling. A system built mostly on nouns tends to pull interactions toward quizzing (“What’s this?”), while a core-rich system invites comments, requests, and opinions. That shift is part of presuming competence: we assume the AAC user has things to say, and we give them the words to say them.
How Many Core Words Should an AAC User Start With?
Most AAC users do best with a robust core word display available from the very start, even when partners are modeling only a handful of words at first. Keeping the full set in view means the AAC user can reach for any word the moment they are ready, instead of waiting for words to be added one at a time. Initiatives like the Universal Core vocabulary from UNC’s Center for Literacy and Disability Studies are built on this idea: one flexible set of high-frequency words that most learners can start with right away. The size of the display the user explores and the number of words a partner models are two different things, and both can grow at their own pace.
This may feel like a lot of words on the screen early on, and that is intentional. A rich display:
- Lets the AAC user discover words on their own, the way speaking children overhear and try out language they were never directly taught.
- Keeps word locations stable as the user grows, so nothing has to move later (more on that next).
- Signals that the team presumes competence, rather than rationing language based on what the user has already shown.
Rather than fix a rigid starting number, lean on the AAC user’s motor and visual profile to choose a grid size that they can see and reach comfortably, then keep that layout consistent. An AAC evaluation is the natural place to settle on a grid size and access method that fits. Many SLPs begin partner modeling with a small set of motivating core words and let the rest of the display stay available for the AAC user to find.
How to Choose First Core Words for a New AAC User
Choose first core words by starting with the words that open the most doors in the AAC user’s daily routines. The goal is a handful of flexible, motivating words you and the family will model often, drawn from a core set the device already holds. A few principles help:
- Pick words that work across many activities. More, go, stop, want, help, all done, like, and that show up everywhere, so they earn their place first.
- Favor words that let the AAC user direct the action. Words that start, stop, or change an activity (go, stop, more, again, different) give the user real control over what happens next, which is deeply motivating.
- Anchor to what the AAC user already cares about. If a child loves movement, go, fast, again, and stop during play will land faster than words tied to a less preferred task.
- Include words for more than requesting. Comments (cool, uh-oh, funny, mine), refusals (no, stop, done), and social words (hi, bye) round out a communicator who does more than ask for things.
- Bring the family in for fringe. Let families add the names, foods, and characters that matter at home. This is the part of the system that feels most personal, and it is a meaningful way to involve them.
These principles give you a starting point you can shape to fit each AAC user. There is no single list every child must begin with, and the words you choose for one learner will look different from the next. What stays constant is the logic: flexible, motivating words first, personal words alongside them.
Keeping Word Locations Consistent
Keeping core words in the same place on the device supports motor learning, which lets an AAC user find a word by the path their hand takes rather than by searching the screen each time. Over time, reaching for want or more becomes closer to automatic, the way a touch-typist finds a key without looking. That automaticity frees the AAC user’s attention for the message itself instead of the search.
Consistent placement, sometimes described as motor planning, is one of the strongest reasons to keep a stable layout from the beginning. A few practical points:
- Build outward. As vocabulary grows, add new words around the existing core, so the words the AAC user already knows by feel stay exactly where they are.
- Keep the layout the same across settings. When the same device travels between home, school, and clinic, the AAC user practices the same motor paths everywhere. This is one reason a family-owned device that goes everywhere supports steady progress.
- Pair stable placement with the lightest helpful support. The prompting hierarchy pairs well here: reach for the smallest support that opens the door, then step back so the AAC user builds the motor pattern themselves.
Consistency does not mean the system can never change. It means changes are additive and intentional, so the AAC user keeps the muscle memory they have already built while the system grows with them.
How Do You Teach Core Words to an AAC User?
You teach core words mainly by modeling them on the AAC user’s own device during everyday moments, a strategy known as aided language stimulation. When a partner taps go while saying “go,” or more while offering more, the AAC user sees how the words on their device map onto the language happening around them. This mirrors how children learn: by hearing words used in context, over and over, long before they produce them.
A few habits make modeling effective:
- Model without requiring a response. Show the word and keep the moment going. The AAC user does not have to tap it back for the model to count.
- Pause and presume competence. After modeling, leave a generous silence. Many AAC users need extra time to take a turn, and rushing in fills the space they would have used.
- Model across the whole day. Snack, play, bath, and car rides are all language-rich. The more partners who model, the faster core words take hold.
- Respond to every message the AAC user sends. When a tap gets a real reaction, the AAC user learns that their words work. This is the heart of programming and using the speech app in real life.
Coaching families and team members to model is often the highest-impact support an SLP provides, because it multiplies the modeling the AAC user receives well beyond the therapy room. If a learner uses whole phrases as single units, the way gestalt language learners often do, the modeling logic still holds; you are simply meeting the language where it is.
Where the Device and the App Fit Together
Core vocabulary lives in the AAC app, while the device is the hardware that runs it, and getting both right is what makes a core word system work. The app provides the word layout, the grid size, and the organization of each page. The device provides the screen, the durability, and the access the AAC user relies on to reach those words across a busy day.
This is where an app-agnostic approach helps. Different AAC apps organize core vocabulary differently, and learners thrive on different layouts. Because the QuickTalker Freestyle runs the app of your choice, you and the family can pick the core word organization that fits the AAC user best, and move to a different app later on the same hardware if their needs change. The hardware also supports the motor consistency that core words depend on, since a rugged case, a comfortable handle strap, and a reliable kickstand keep the same device, and the same word locations, available everywhere the AAC user goes. The National Institute on Deafness and Other Communication Disorders describes assistive communication devices as tools that help people “communicate more meaningfully and participate more fully in their daily lives,” and a well-organized core vocabulary is a big part of how that participation grows.
Frequently Asked Questions
What is core vocabulary in AAC?
Core vocabulary in AAC is the small set of high-frequency words that work across almost any topic or setting, such as want, more, go, stop, help, like, and that. A few hundred core words make up most of what any of us says day to day, which is why they give an AAC user the widest reach from the fewest words.
What is the difference between core and fringe vocabulary?
Core words are high-frequency words that work everywhere (go, want, more, help, like). Fringe words are specific words tied to one topic or activity, such as names, places, foods, and favorite characters. Core words carry conversation across settings, while fringe words add the personal detail that makes a message specific to the AAC user’s life.
How many core words should an AAC user start with?
Most AAC users do well with a robust core word display available from the start, even when partners are modeling only a handful of words at first. Keeping the full set visible means the AAC user can reach for any word when they are ready, rather than waiting for words to be added one at a time. The number of words you model grows naturally as the AAC user explores.
Should core words stay in the same place on the device?
Yes. Keeping core words in the same location supports motor learning, so the AAC user can find a word by the path their hand takes rather than by searching the screen each time. Consistent placement is one reason many SLPs keep the same word layout as vocabulary grows, adding new words around the stable core rather than rearranging it.
How do you teach core words to an AAC user?
Model core words on the AAC user’s own device during everyday moments, a strategy known as aided language stimulation. When a partner taps go while saying go, or more while offering more, the AAC user sees how their device maps onto the words around them. Modeling across real routines, paired with responsive partners, is what helps core words take hold.
Does the AAC app or the device decide the core vocabulary?
The AAC app provides the core vocabulary layout and the words on each page; the device is the hardware that runs the app. An app-agnostic device lets you choose the app whose core word organization best fits the AAC user, and switch apps later on the same hardware as the user grows, without buying a new device.
Putting Core Vocabulary to Work
If you are setting up a new communicator, start with a robust core display, choose a small set of flexible, motivating words to model first, and keep the layout stable as the system grows. If you are revisiting a system that leans heavily on nouns, look for places to bring core words forward so the AAC user can comment, direct, and ask questions. The aim is range: a handful of words that recombine into a real voice.
If you would like a partner in this work, explore how to get started with QuickTalker Freestyle or reach out to the SLP Empowerment Team for a consult. Core vocabulary is the foundation every other AAC skill builds on, and a strong, stable core gives every AAC user the widest possible voice from their very first words.
