Communication and learning

Augmentative and alternative communication (AAC): a guide for families

2026-07-14 · 5 min read

When Leo pointed at the symbol for “water” for the first time instead of crying with frustration, his mother laughed and cried at once. Leo is six, he's autistic and he doesn't speak yet. For a long time his family read every meltdown as a mystery. That day they understood something simple and enormous: Leo had always had things to say. He just had no way of saying them.

That, in one sentence, is augmentative and alternative communication (AAC): a set of resources that let people express themselves when they can't — or can't always — do it through speech. If you've just come across the term and don't know where to begin, this guide is for you.

What AAC is (and isn't)

AAC is an umbrella term. Augmentative means it supplements speech that already exists; alternative means it replaces speech where there is none. And it isn't a single thing but a whole range, from the very simplest to the most technological:

AAC isn't a staircase with an end point — it's a range of options you can mix.

One very common fear is worth dismantling straight away: using AAC does not stop someone developing speech. The available evidence points the other way — giving a person a route to communicate tends to reduce frustration and, in many cases, supports language. Offering AAC isn't “giving up” on speech; it's making sure the person can communicate in the meantime.

Where to start at home

You don't need to wait until everything is perfect. The key is to start with what genuinely matters to the person: the first symbols should let them ask for things they want — a toy, a food, “more”, “again”, “no” — because communication takes off through motivation, not through “educational” vocabulary.

Beyond choosing the first words well, it helps to model — if you expect them to use symbols, use them yourself while you speak: point at the symbol for “water” as you say “water”. Allow response time, because composing a message with symbols takes longer than speaking. And accept any attempt: a gesture, a glance or a point all count as communication and deserve a response.

The role of technology

Paper boards work, and they're a great start. But AAC apps bring clear advantages: synthesised speech — the app “says” what's been composed — vocabulary you can extend without reprinting anything, and the ability to personalise symbols with real photographs from the person's own surroundings.

When choosing an AAC app, look for one that is customisable (you can add that person's own symbols and words), consistent (symbols don't move around, because motor memory matters a great deal), accessible (size, contrast, touch duration) and respectful of privacy, particularly as children are often involved. These criteria overlap with those in our guide on how to choose an accessible app for a relative.

Work alongside professionals

AAC gets better results with the support of a speech and language therapist or a specialist, who can assess which system and which vocabulary fit best and how to introduce them. This guide doesn't replace that guidance: it's a map so the conversation with the professional starts from somewhere, and so progress can happen at home every day.

When the system doesn't fit your child or relative

One of the great challenges of AAC is that every person is different. A board designed for an autistic child may be no use to an adult with aphasia; a standard vocabulary may leave out precisely the words that family needs. Many solutions are too generic, too expensive, or simply don't exist in the right language or context.

That lack of fit is a real need, and real needs are where Software as Help begins. We collect specific cases from families and professionals, we work out with the community how many people share that same gap, and when there's demand we build the tool — free for whoever needs it. If you're looking for an AAC system and none of them fit, tell us: you may not be the only family in that position.

In short

AAC rests on a simple, powerful idea: everyone has the right to communicate, and if speech isn't the route, there are others. Start with what motivates them, model, be patient, lean on professionals, and choose tools that are customisable and accessible. Leo now puts together three-symbol sentences and his home is a calmer place. And if nothing fits your case, remember that gap can be filled too.