Modeling AAC

Aided language stimulation, the rate of modeling, and what it actually looks like all day

For paraprofessionals supporting AAC users

Why this brief

Modeling AAC — using the student's communication system as you talk with them — is one of the most evidence-supported and most consistently underused practices in AAC implementation. The principle is simple: AAC users learn from seeing their system used, just like speaking children learn from hearing words. The practice is harder than it sounds: it requires the para to actually pick up the device, find the words, and say-and-touch in real time, dozens or hundreds of times a day. Most paras don't do this consistently. The students they support, as a result, often progress slowly through their AAC.

This brief covers the practical version: what aided language stimulation is, why it works, how to do it without freezing up, the rate of modeling that's actually meaningful, what to model and what not to, common implementation challenges, and how to integrate this into a real day. Brief 10.01 (Communication Bill of Rights) and 10.02 (AAC Overview) cover the underlying frameworks; this one is the daily practice.

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| The frameAAC users learn language the same way speaking children do — by seeing it used around them, in meaningful contexts, many many times. The para's role is to be the model. If you can't or don't model on the system, the student is being asked to learn a language no one is speaking around them. They will progress, but slowly. |

Who this brief is for

Paras supporting AAC users — speech-generating devices, low-tech boards, PECS, communication books

Paras working with non-speaking or minimally-speaking students

Inclusion paras whose students use AAC in gen-ed

Supervising teachers, SLPs, and BCBAs designing AAC implementation

What modeling AAC is

Definition

Modeling AAC — also called aided language stimulation, aided language modeling, partner-augmented input, and other terms — is the practice of communicating with the AAC user by using their communication system alongside spoken language. As you say something, you also touch the relevant symbols on their device or board.

Examples

Saying "want" while touching the WANT symbol on the device

Saying "big dog\!" while touching BIG and DOG

Saying "what do you want?" while touching WHAT and WANT

Saying "I see" while touching I and SEE

Why it works

Children learn language by hearing it used around them — speaking children hear thousands of utterances a day

AAC users typically see almost no models of using their system

Without models, they're being asked to learn a language no one speaks

Modeling provides input the way speech provides input for typically developing children

Research consistently shows AAC users whose partners model develop more sophisticated communication faster

Research support

Aided language stimulation has been studied since the 1980s

Multiple meta-analyses show positive effects on AAC use, vocabulary, and combination of words

Effects across populations — autism, intellectual disability, cerebral palsy, complex communication needs

Effects across system types — low-tech and high-tech

How often to model

This is where the practice usually fails. Modeling needs to be far more frequent than most paras realize.

The aspirational target

Some research suggests aiming to model 80% of utterances when supporting an AAC user during instructional time

That sounds impossible; in reality, it means 'a lot' rather than literally 80%

More realistic working target: model multiple times per minute during interaction, dozens of times per hour

Comparison to typical language exposure

Typically developing children hear thousands of words per hour

AAC users see only what's modeled

Even significant modeling is far below the input typically developing children get

Some is much better than none

Realistic working approach

Every meaningful utterance: model it

Greetings, requests, comments, transitions

Throughout the school day, not just in 'speech time'

It feels weird at first; it gets natural with practice

Don't wait for opportunities

Don't only model when the student is initiating

Don't only model in response to communication

Model preventively — comments, descriptions, narrations

This is parallel to how parents talk to typically developing infants long before they speak

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| Frequency over perfectionIt's better to model lots of approximate things than to wait until you find the perfect words. The student benefits from seeing the system used, even imperfectly. Don't let the search for the right symbol stop you from modeling at all. |

What to model

Core vocabulary first

Core vocabulary = high-frequency words that work across contexts (want, like, more, stop, go, help, do, this, that)

Brief 10.08 (Core Vocabulary, planned) covers this in depth

Most communication is built from core, not specific nouns

Modeling core builds the most generative language

Beyond requesting

Don't only model 'I want X' patterns

Model commenting ("this is fun," "I see a dog")

Model asking questions ("what is that?" "who came?")

Model describing ("big," "red," "fast")

Model feelings ("happy," "mad," "surprised")

Model social phrases ("hi," "thank you," "my turn")

Slightly above the student's current level

Krashen's i+1 — input slightly above current production

If student uses single words, model two-word combinations

If student combines two, model three

Don't drop too far below or shoot too far above

Authentic communication

Model language that's genuine, not artificial

Don't only model in lessons or drills

Model around real activities the student is engaged in

Don't pretend to be the student

Don't put words in their mouth ("You want cookie")

Do model self — "I want cookie" — and let them communicate for themselves

How to actually do it

The practical mechanics. Many paras freeze up because they don't know how to start.

Get to know the system

Spend time with the student's device or board

Find common words you'll need (want, like, more, stop, go, help, this)

Practice navigating to specific words you'll likely use

Work with the SLP for orientation

Start small

Don't try to model perfectly from day one

Pick 1-2 words you'll model heavily for a week

Add words as you get comfortable

Build the habit gradually

Position matters

Sit so you can both see and touch the device

Some configurations: device between you, both facing forward; device facing student with you reaching across

Honor student's access — don't block them from using it themselves

Speak as you touch

Say the word as you touch the symbol

Don't whisper; this is communication, not stealth

Pace the touches and words together

Wait time

After modeling, wait — give the student opportunity to respond, comment, or use the system

5-7 seconds, sometimes longer for some students

Don't rush past the chance for them to engage

Don't expect immediate response

Modeling is input, not a request for output

Student doesn't have to use the system after you do

Acceptance of any communication mode (vocalization, gesture, eye gaze)

Common types of phrases to model

| Situation | Sample model |

| :-: | :-: |

| Coming into the classroom | I + COME (touch as you say it) |

| Starting work | WORK + DO |

| Frustration | I + DON'T + LIKE + THIS |

| Choices | I + WANT + \_\_\_ |

| Snack time | EAT + GOOD + MORE |

| Recess | I + LIKE + RUN |

| Stop and go | STOP / GO |

| Asking | WHAT + DO + YOU + LIKE? |

| Comment | I + SEE + DOG |

| Done | I + DONE / I + STOP |

Don't make the student perform

Modeling is input, not a test.

Don't

Demand the student use the system after you model

"Now you say it"

Withhold an item until the student uses the AAC

Hand-over-hand the student through using the system as a 'response' to your model

Why not

Modeling is the input that builds language

Forcing output without spontaneous initiation can damage the relationship with the system

AAC use needs to be voluntary and meaningful

Brief 10.01 (Communication Bill of Rights) — autonomy in communication is a right

Do

Provide opportunities for student-initiated communication

Honor any communication form they choose

Respond enthusiastically when they use the AAC

Continue modeling regardless of whether they responded

Distinction from teaching

Specific AAC instruction (PECS phases, prompted communication) follows specific protocols

Modeling is partner-augmented input — different from instruction

Most AAC programs include both

Brief 10.03 (PECS) covers protocol-driven instruction

Consistency across the day

Modeling can't only happen during specific times. It needs to be everywhere.

Everywhere the student is

Classroom, hallway, recess, lunch, bathroom transitions

Specials — PE, art, music

Library, computer lab

Field trips

Everyone the student interacts with

All paras

Gen-ed teacher when student is in inclusion

SLP, OT, PT during their sessions

Specials teachers

Office staff

Lunch and recess monitors

Coordinating across staff

Brief everyone on the importance of modeling

Train staff on the basics

Make device available across all settings

Don't let the student have wall-to-wall partners who don't model

Generalization through partner variety

Different communication partners modeling deepens learning

Different contexts deepen generalization

Communication that works only with one partner has limited value

Equipment considerations

Device access

AAC must be available everywhere — see brief 10.01

Charging schedule

Mounting and access for the student

Backup low-tech version for emergencies

Modeling logistics

Position so you can both touch the device

Avoid blocking student's primary access

Some devices have partner-modeling features (highlighting, partner mode)

Low-tech boards — sometimes you have a copy and the student has theirs

Vocabulary breadth

Without sufficient vocabulary, you can't model meaningful language

Bring vocabulary gaps to the SLP

Update over time as student grows

Brief 10.08 (Core Vocabulary, planned)

Speed of access

Some devices have many layers; finding words takes time

Practice speeds you up

Some words can be found quickly; deeper-buried words take longer

As para, you become familiar with the layout over time

Common challenges

"It feels weird"

Yes, especially at first

It gets natural with practice

Students notice when you stop, even when you don't realize

"I can't find the words fast enough"

Practice with the device when student isn't there

Stick with high-frequency words that are easy to find

Better to model some than to give up because you can't find the perfect word

"The student doesn't seem to use it more even when I model"

Effects can take weeks to months to show

Continue modeling regardless of immediate response

Track progress over weeks, not days

Coordinate with SLP about whether other supports are needed

"I'm interrupting my own teaching"

True at first; gets easier

Some teaching adjusts to incorporate AAC modeling naturally

Brief moments of modeling don't really interrupt; pauses for the student to engage are part of the work

"Other staff don't model and the student is fine with them"

Other staff may be missing the practice; not a sign you should stop

Student's progress depends on their input

Set the example; some staff will follow

"The student gets frustrated when I model"

Sometimes happens — student feels pressure or wants to do it themselves

Pull back briefly; observe what's happening

Modify position or pace

Don't abandon modeling, but adjust how you do it

"I forgot all morning"

Restart in the afternoon

Don't shame yourself

Build the habit slowly

Partner roles in different settings

Different communication partners have different roles. Coordinate.

Para — primary partner most of the day

Heavy modeling responsibility

Continuous engagement

Building familiarity with system

SLP — primary AAC programmer

Designs the system

Trains modeling techniques

Periodic direct sessions with student

Brief 12.03 (Working with the SLP)

Gen-ed teacher in inclusion

Should also model

May need orientation from SLP and para

Often less familiar with system

Brief 11.11 (Inclusion / Co-Teaching)

Family

Modeling at home accelerates progress

Family training from SLP usually

Communication boards/devices travel home

Sometimes family is uncomfortable with AAC; engagement matters

Peers

Peers can be communication partners and modelers

Brief introduction to system helps

Peer modeling is powerful

Don't make peers responsible for primary support, though

Measuring progress

AAC progress is real but slow. Measuring matters.

What progresses

Number of different words used

Word combinations (single → two-word → multi-word)

Range of communication functions (requesting → commenting → asking)

Communication partners (one → many)

Settings (one → many)

Spontaneity (prompted → independent)

Data systems

Some devices automatically log usage

Manual data collection on specific targets

Periodic samples — record device use during specific 10-minute periods

Brief 06.01 (Data Types Overview)

Pacing expectations

AAC progress often slower than speaking children's progress

Months or years for significant changes

Don't get discouraged by slow visible progress

Long-term trajectory matters more than weekly visible change

Working with SLP

SLP analyzes progress and adjusts the system

Vocabulary additions

Page navigation changes

Move from one system to another sometimes

Brief 12.03 covers SLP collaboration

Motivation and AAC

Motivation matters in AAC like in any learning.

What motivates AAC use

Successful communication — being understood

Access to preferred items, activities, social interaction

Sense of agency

Models showing the system is for real communication

What demotivates AAC use

Communication that doesn't work — partners who don't understand

Communication that's punished or restricted

Pressure to use the system in ways that feel forced

System that doesn't have the words the student wants

Lack of partners who model

What you can do

Honor every attempt at communication

Make communication immediately rewarding

Don't withhold to force AAC use

Model robustly so the system feels alive

Bring vocabulary gaps to the SLP

Modeling AAC for multilingual learners

Specific considerations:

Language of the system

Some AAC systems support multiple languages

Family preferences matter

Bilingual modeling supports bilingual learners

Don't force English-only on a multilingual student

Cultural representation

Symbols that reflect student's life — family members, foods, holidays, religious practice

Brief 15.06 (Religious Considerations) overlaps

Family input on important vocabulary

Coordination with EL coordinator

Brief 08.06 (WIDA) covers proficiency-level approaches

AAC complements rather than replaces language acquisition support

Pitfalls

| Try this | Watch out for |

| :-: | :-: |

| Model the system frequently throughout the day | Use AAC only during specific 'communication time' |

| Model both core vocabulary and specific nouns | Model only nouns or only requests |

| Wait for student-initiated communication after modeling | Demand student use the system after you model |

| Honor any communication form the student uses | Force AAC use over other communication forms the student prefers |

| Model slightly above current production level (i+1) | Stay always at the student's current level |

| Practice navigating the system when student isn't there | Try to learn it in real time during instruction |

| Brief and train other staff on modeling | Be the only person modeling on the system |

| Coordinate with SLP about progress and system updates | Implement modeling without team coordination |

| Bring vocabulary gaps to the SLP | Settle for inadequate vocabulary because changing it requires effort |

| Track progress over weeks and months | Get discouraged by slow weekly progress |

Scenarios

Scenario 1: New AAC user; you don't know the system

A student in your class just got a new AAC device. You're not familiar with it.

Sit with the device when student isn't there. Find core vocabulary (want, like, more, stop, go, help, this). Find common nouns the student uses. Practice navigating quickly. Coordinate with the SLP for orientation. Start modeling 5-10 times the next day. Add over time. Don't wait until you know everything; start with what you know.

Scenario 2: Student isn't using the device much

Despite the team's efforts, your student rarely uses their AAC device.

Several possibilities. (1) Modeling isn't happening enough across the day — does the student see the system used by adults in real communication? (2) Vocabulary doesn't fit student's actual life — bring concerns to SLP. (3) Communication breakdowns — system isn't working when used. (4) Motivation issue — communication isn't rewarded reliably. (5) Time — AAC progress is slow; hang in. Coordinate with SLP. Brief 12.03 (Working with the SLP) and 10.01 (Communication Bill of Rights) overlap.

Scenario 3: Other staff don't model

You model regularly. The other para and the gen-ed teacher don't. The student sees the system used much less than they should.

Bring it to the SLP and supervising teacher. Suggest team training on modeling. Provide handouts or quick examples. Don't lecture peers; do bring the issue up the chain. The student's progress depends on consistent modeling across partners. This is a coordination issue more than an individual one.

Scenario 4: Lesson is moving fast; you can't model

During a fast-paced gen-ed lesson, you literally don't have time to model — the teacher is moving too fast.

Modify approach. Coordinate with the gen-ed teacher about pace. Pre-teach key vocabulary before the lesson — that way modeling has been front-loaded. Pick 2-3 key words you'll model when they come up. Don't try to model everything in fast-paced settings; focus on highest-impact modeling. Brief 11.11 (Inclusion / Co-Teaching) covers gen-ed coordination.

Scenario 5: Student frustrated when you model

Your student gets frustrated when you touch their device — pulls it away, fusses, sometimes refuses to engage.

Modify position; some students don't like sharing the device. Use a separate copy of the board if low-tech. Modify pace; you may be modeling too much. Coordinate with SLP — sometimes student frustration signals system issues. Don't abandon modeling, but adjust the how. Brief 10.01 (Communication Bill of Rights) — student's autonomy matters.

Scenario 6: Student starting to combine words

Your student has been using single words and is now starting to combine two.

Excellent. Move modeling up to two- and three-word combinations. "I want cookie" becomes "I want big cookie" or "I want more cookie now." Document the change for the SLP. Continue modeling slightly above current level. The trajectory you're seeing is what AAC is supposed to do. Brief 12.03 covers SLP coordination. Brief 10.08 (Core Vocabulary, planned) covers core vocabulary expansion.

Closing thought

Modeling AAC is one of the lowest-tech, highest-leverage things paras can do. It costs nothing. It requires no specific certification. It compounds over months and years into students who communicate more, with more partners, in more contexts. The cost is mostly habit-building — the discipline of picking up the device dozens or hundreds of times a day, finding the words, saying-and-touching together.

Most AAC users see far less modeling than they should. The students you support are likely no different. The single most valuable thing you can do for an AAC user across the school day is to be the partner who models robustly. Not perfectly; persistently. Done across years, this is what builds real communicators.

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| Bottom lineModel the system frequently throughout the day. Model core vocabulary and beyond requesting. Don't demand response. Honor any communication form. Model slightly above current level. Practice the system when student isn't there. Brief and train other staff. Coordinate with SLP. Bring vocabulary gaps to the team. Track progress over weeks and months. The cost is habit; the benefit compounds. |

Related briefs

10.01 Communication Bill of Rights

10.02 AAC Overview

10.03 PECS and Picture Exchange

10.04 Assistive Technology Overview (planned)

10.06 Visual Supports

10.08 Core Vocabulary (planned)

06.01 Data Types Overview

06.03 Prompt-Level Data

11.11 Inclusion / Co-Teaching

12.03 Working with the SLP

12.06 Working with the BCBA

Resources: ASHA AAC resources; Project Core (free curriculum and modeling videos); SLPs in your district; AAC Institute

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