Speech Activities by Age

Down syndrome and speech and language therapy: what actually works

Children with Down syndrome average first words at 18 to 24 months. Here's what speech therapy looks like, when to start, and which approaches have the best evidence.

Young child with Down syndrome and therapist communicating during speech therapy session

Last updated 2026-07-10

Young child with Down syndrome and therapist communicating during speech therapy session

Nearly every child with Down syndrome has some kind of speech or language delay, and the causes are physical as much as cognitive. Low muscle tone makes it harder to shape sounds, hearing differences make it harder to hear those sounds clearly in the first place, and gaps in verbal memory make it harder to hold a string of sounds together long enough to say them out loud. The good news is that therapy works, especially when it starts early (before a first birthday if possible) and leans on approaches with real evidence behind them: AAC, parent-taught strategies, and direct work on making speech understandable to people outside the family.

Knowing what's driving a particular child's delay matters because it changes what therapy should look like. The most immediate factor is hypotonia, low tone in the lips, tongue, and jaw, which makes precise articulation physically harder. That's a big reason speech intelligibility is often more of a struggle than vocabulary size for kids with Down syndrome [1].

Hearing is the second piece, and it's a big one. Somewhere between 38 and 78 percent of children with Down syndrome have some degree of hearing loss, most often the conductive kind caused by fluid in the middle ear [2]. A child who isn't hearing sounds cleanly can't be expected to produce them reliably, which is why hearing needs to be checked at birth and then every six months through early childhood, not just once.

Then there's working memory. Verbal short-term memory tends to be a relative weak spot in Down syndrome, so a child may understand far more than they can repeat back or say out loud, simply because holding onto a string of sounds long enough to produce it takes real effort [3]. Many of these children lean on visual and spatial memory instead, which tends to be stronger, and good therapy uses that strength on purpose. This also explains the wide gap between what a child understands and what they can say: a kid might follow a two-step direction without trouble but not manage a two-word phrase. That gap is common and real, and judging a child's understanding by their speech alone will sell them short.

How early should therapy start?

As early as possible, ideally before the first birthday. This isn't just a nice idea: the brain's language networks are most flexible in the first two years, and starting intervention in that window leads to better outcomes than waiting [4].

In the US, the Individuals with Disabilities Education Act (IDEA), Part C, guarantees free early intervention from birth through age two for children with a diagnosed condition like Down syndrome [5]. You don't need to wait for your child to visibly fall behind. The diagnosis itself qualifies an infant for evaluation and services, and the law requires these services be delivered in the child's "natural environment," which is usually your own home.

After age three, things shift to the school system under IDEA Part B, and your child gets an Individualized Education Program (IEP) with speech therapy built in. Plenty of families add private speech therapy on top of that, since school sessions, often just thirty minutes a week, tend to run short. The National Down Syndrome Society recommends requesting a speech-language evaluation as soon as possible after birth [6], and you don't have to wait for a pediatrician to suggest it. You can self-refer to your state's early intervention program directly.

Most children with Down syndrome say their first words between 18 and 24 months, compared with around 12 months for typically developing children. That gap is exactly why starting early, sometimes at two or three months old with a focus on feeding, oral motor work, and parent-child communication, makes such a difference.

What therapy actually looks like

There's no single script an SLP follows. A good therapist builds the plan around your child, but a few elements show up again and again across effective approaches for Down syndrome.

With infants, therapy often starts at the feeding table. Breastfeeding and bottle feeding use the same muscles involved in speech, and an SLP can guide positioning and latch to build strength and coordination early on [1]. It's practical work, not abstract theory.

With toddlers, the focus tends to shift toward the groundwork of communication: joint attention, taking turns, and intentional signals like reaching or pointing to get something. A whole session might revolve around bubbles, with the therapist teaching a child to look at the adult, ask for more, and wait a beat. That's real language-building, even without a single word spoken.

Once a child is ready for words, therapy often follows the child's lead: creating little moments of "communication temptation" (a favorite toy sealed in a clear jar the child can't open alone) and expanding on whatever the child says. If the child says "ball," the adult responds with "red ball" or "throw ball," adding a bit more each time.

Getting speech to be understandable gets direct attention too, since kids with Down syndrome are often perfectly clear to family but hard for strangers to follow. Articulation and motor speech work targets specific sounds with lots of repetition and quick feedback. Some programs draw on childhood apraxia of speech techniques, since a portion of children with Down syndrome also have apraxia, a motor planning issue that needs its own approach [7].

None of this works without parents. A child might see an SLP for one to three hours a week, out of 168 hours total. What happens in the other 165 is where the real progress happens, so good therapy trains parents to use specific strategies all day long, not just watch from the sidelines during sessions.

Typical language milestone comparison: Down syndrome vs. typical development Approximate age ranges (months) for key speech and language milestones First words (typical) 12 First words (Down syndrome) 21 Two-word combinations (typical) 18 Two-word combinations (Down syndr… 36 Short sentences (typical) 24 Short sentences (Down syndrome) 48 Source: National Down Syndrome Society; ASHA Down Syndrome Practice Portal, 2023

Will AAC delay speech?

No, and this is probably the question parents ask most often. The evidence is clear that AAC does not delay or replace spoken language. It supports it [8].

AAC covers a lot of ground: sign language, picture boards, speech-generating devices, apps, anything that adds to or stands in for spoken words. For children with Down syndrome, starting AAC early, sometimes with simple signs as young as 9 to 12 months, gives them a way to communicate before their speech motor system catches up. That cuts down on frustration, builds vocabulary, and tends to speed up spoken language rather than get in its way.

Sign language (often a simplified version like Makaton or key word signing) is usually the first AAC tool families try, since it doesn't require a device and caregivers can pick it up too. Pairing a sign with a spoken word reinforces the vocabulary from two directions at once.

As kids get older, many families move on to dedicated speech devices or symbol-based apps, such as Tobii Dynavox systems or iPad programs built around communication pages. A well-set-up AAC system isn't meant to hand a child 20 core words and stop there. The goal is access to hundreds of words across every category, so the child can say roughly anything a speaking peer their age might say.

The American Speech-Language-Hearing Association holds that AAC should be considered whenever a child's communication needs aren't being fully met through speech alone [8]. For most kids with Down syndrome, that means AAC deserves a place in the plan from day one, not as a backup after speech has "failed."

Cost is a real barrier. A dedicated speech generating device can run anywhere from $3,000 to over $8,000. Medicaid and private insurance often cover them, but prior authorization can be slow and frustrating to navigate, and an SLP can help by writing the letter of medical necessity.

The evidence base for Down syndrome-specific speech interventions is thinner than anyone would like. Most large speech therapy trials enroll mixed populations, and the Down syndrome samples inside them are often too small to draw firm conclusions. Still, a few approaches have real research behind them. Naturalistic Developmental Behavioral Interventions, or NDBIs, have the strongest cumulative evidence for improving expressive language in young children with developmental disabilities. These approaches combine behavioral principles with child-led play. Enhanced Milieu Teaching is one well-studied example, and it has shown positive effects specifically in children with Down syndrome [4]. Parent-implemented intervention also consistently outperforms clinic-only therapy in studies of young children with language delays, and the Hanen "More Than Words" program has research support for families of children with Down syndrome [9]. Oral motor therapy is shakier ground. Non-speech oral motor exercises, things like blowing or tongue exercises done without words, don't have solid backing. The American Speech-Language-Hearing Association has said there isn't sufficient evidence that these exercises improve speech intelligibility [8]. If an SLP builds your child's whole session around 20 minutes of tongue sticking, that's not coming from strong evidence. Literacy-based approaches lean on the visual memory strength common in Down syndrome. Children with Down syndrome often learn to read earlier than their spoken language would predict, and reading instruction can actually drive spoken language gains forward. Down Syndrome Education International has published research supporting this [10]. And when apraxia co-occurs, which happens in a meaningful subset of children with Down syndrome, motor speech approaches like the Nuffield Dyspraxia Programme or Rapid Syllable Transition Treatment come into play. The page on apraxia of speech explains how motor speech therapy differs from regular articulation work.
ApproachEvidence level for Down syndromeNotes
Naturalistic/NDBI (e.g., Enhanced Milieu Teaching)Moderate-strongMultiple RCTs, some DS-specific
Parent-implemented intervention (e.g., Hanen)ModerateStrong theoretical basis, some DS evidence
AAC (signs, devices)ModerateDoes not delay speech; improves communication
Literacy-based language interventionModerateUses visual memory strength
Non-speech oral motor exercisesWeakNot supported by ASHA for speech improvement
Motor speech approaches (for co-occurring apraxia)Moderate (for apraxia generally)Less DS-specific data
Nobody can hand you a confident number of sessions per week without knowing your child, and anyone who tries is guessing. What the research does suggest is that intensity matters: therapy packed into a shorter, more concentrated block often beats the same number of hours spread thin over years [4]. In early intervention, from birth to age three, many children get therapy once or twice a week. After three, frequency depends heavily on the IEP and district, and once-a-week sessions are typical. Specialists in Down syndrome often recommend adding private therapy on top of school services when families can manage it. Access isn't equal, and it's worth saying plainly. Private speech therapy runs roughly $150 to $350 per session in most U.S. markets, though that range shifts a lot by region. Medicaid covers speech therapy for eligible children, and most private insurance covers at least some of it, but authorizations, session caps, and out-of-network headaches all get in the way. Telehealth has grown into a real option too, especially for rural families or anyone who struggles to get to a clinic, and online speech therapy tends to work especially well for the parent-coaching side of treatment. Session frequency isn't actually the biggest lever. What happens between sessions matters more. A parent who practices specific language strategies for 15 minutes a day will usually see better outcomes than a child attending two sessions a week with no carryover at home, which is why a good SLP sends you home with concrete, doable tasks every time. Early intervention is the federally guaranteed system serving children from birth to three who have developmental delays or diagnosed conditions. Under IDEA Part C, every state has to provide these services at no cost to families, though a few states charge a sliding-scale fee for certain pieces of it [5]. To get started, contact your state's lead agency (this varies by state, sometimes it's Health, sometimes Education or Human Services), which you can find through the IDEA website. A Down syndrome diagnosis at birth qualifies a child automatically for evaluation, no need to prove a certain percentage of delay. Once you're referred, your child gets a multidisciplinary evaluation, and then an Individualized Family Service Plan within 45 days, laying out exactly what services they'll get and how often. Speech therapy is almost always part of it, along with physical therapy and developmental intervention. The handoff from early intervention to school-based services at age three is a known rough patch for families, since services don't continue automatically. Request an evaluation from your school district before your child turns three, ideally 90 days ahead of time, and don't assume anything carries over. The early intervention page goes into more detail on how the system works and what to push for. Therapy for a ten-year-old with Down syndrome looks nothing like therapy for a toddler. School-age work tends to focus on being understood by unfamiliar listeners, building vocabulary, and narrative language, that is, telling a story or explaining something in order. Social communication gets more airtime too: turn-taking, repairing misunderstandings, adjusting how you talk depending on who you're talking to. Kids using AAC spend this stage expanding vocabulary pages and picking up speed and complexity. Adolescence shifts the priorities again, toward self-advocacy, job-interview language, and conversation skills for community settings. Some teens with Down syndrome are perfectly understood by family and friends but harder to follow in noisy rooms or with strangers, and targeted work on those specific situations tends to pay off. Adults with Down syndrome keep benefiting from speech therapy too, whether through vocational rehab programs, adult day programs, or private practice. Language learning doesn't have a cutoff age. The pace slows and the ceiling can be lower if intervention wasn't intense early on, but progress is still real. The page on speech therapy for adults covers what services look like later in life and how to find them. Literacy is worth calling out on its own. Kids with Down syndrome who learn to read tend to have stronger spoken language outcomes, since reading gives them another route into vocabulary and lets them pull in information independently. Early, systematic phonics instruction works well for most children with Down syndrome, even when their spoken language is lagging well behind. Parents have more influence here than almost anywhere else. The single most evidence-backed thing you can do is talk with your child, not around them: narrate what you're doing, name objects during everyday routines, and wait after you ask a question instead of jumping in to fill the silence. That wait is sometimes called an expectant pause, and it's one of the most effective tools in parent-implemented intervention [9]. Respond to every attempt at communication, not just the clear words. If your child points at the fridge and makes a sound, that's communication. Name it ("milk! you want milk"), give it to them, and make a fuss over it. Treating unclear attempts as real communication teaches kids that communication actually works. Read together every day. Point at pictures, name them, ask questions. For kids with Down syndrome, books aren't just literacy practice, they're structured vocabulary sessions with a visual anchor. Board books, wordless picture books, and repetitive-text books all have a place depending on the stage. Lean on routines. Kids with Down syndrome often pick up language faster inside predictable contexts, since the familiar setting lowers the mental load. Bath time, meals, getting dressed: these hand you built-in repetition every single day. If your child's SLP has given you specific targets, whether that's a word list or a technique like modeling, use them, and use them often. One well-placed moment of practice at every meal beats a formal ten-minute session your child dreads. If you want a structured way to keep language practice going between sessions, the Little Words app was built for exactly that: guided activities matched to your child's current communication level. You can check whether it's a fit at littlewords.ai/start.Not every SLP has real experience with Down syndrome, and that gap shows up fast. The oral motor profile, working memory differences, and communication strengths of these kids are distinct enough that a therapist whose caseload is mostly late talkers or stuttering may not be the right match. Ask directly how many children with Down syndrome they currently see and what approaches they use. Ask how they feel about AAC, too. A therapist who hesitates to introduce it early, or who worries it will discourage speech, is working from an outdated idea. Check for state licensure and the CCC-SLP credential from the American Speech-Language-Hearing Association[8]. Some SLPs also carry extra certification in AAC or in specific methods like PROMPT (Prompts for Restructuring Oral Muscular Phonetic Targets), a tactile-kinesthetic approach that a number of children with Down syndrome respond well to. You should expect to be in the room. If a therapist shuts the door and sends you to the lobby, that's a red flag for a young child: you need to see what's happening so you can carry it into daily life at home. Down Syndrome Education International and the National Down Syndrome Society both keep provider directories that can help you find experienced clinicians[6][10]. Telehealth also opens things up considerably, so you're not limited to the two SLPs within driving distance who happen to take your insurance. If you want a deeper look at evaluating credentials and finding the right fit, our guide to choosing a speech therapist walks through it. Some children have both Down syndrome and autism, so it's a fair question to ask how the therapy differs. Estimates suggest 16 to 18 percent of people with Down syndrome may also meet criteria for autism, though diagnosis in this population is complicated[11]. The language profiles really do differ: kids with Down syndrome usually want to connect and communicate, and their main obstacles are motor and memory-based, while autistic children often show different social communication patterns, so therapy gets calibrated differently from the start. With Down syndrome, therapy tends to focus on motor speech, intelligibility, and building a full vocabulary through AAC so a child can express what they already understand socially. With autism, sessions more often target pragmatics and social communication, sometimes with very different AAC needs. When both diagnoses show up together (sometimes called DS-ASD), therapy has to address both profiles at once, and a therapist experienced with dual diagnosis is harder to find but worth the search. Our piece on speech therapy for autistic children covers what that support looks like in more depth, and kids who also show echolalia (repeating heard words or phrases) may benefit from strategies borrowed from that literature, since the two overlap quite a bit.

Common questions parents ask

At what age should a child with Down syndrome start speech therapy?

As early as possible, ideally within the first few months of life. Under IDEA Part C, a Down syndrome diagnosis at birth qualifies an infant for early intervention services, including speech therapy, at no cost to the family. That first year usually centers on feeding, oral motor development, and parent communication strategies, which lays the groundwork for words later.

What's the average speech milestone timeline?

First words typically arrive between 18 and 24 months, compared with around 12 months in typical development, and two-word combinations usually show up between 24 and 36 months or later. Intelligibility, meaning how well strangers can understand a child's speech, often stays hard even into the school years, even once vocabulary is coming along well.

Will my child with Down syndrome ever talk?

Most children with Down syndrome develop some functional spoken language, though how much varies widely. Some end up speaking clearly in full sentences; others have real intelligibility challenges but communicate well using speech plus AAC. Starting early, staying consistent, and using AAC to bridge gaps all help. Nobody can predict where a specific child will land, and outcomes overall have improved a lot with modern intervention.

Is sign language good or bad for speech development?

Good, and the research is consistent on this: early signing supports spoken language rather than delaying it. Signs give a child a way to communicate before their speech motor system catches up, which cuts down on frustration and builds vocabulary along the way. Most children drop the signs naturally once speech becomes functional enough, and signing alongside speech reinforces word learning through two channels at once.

How much does speech therapy for Down syndrome cost?

Private sessions run roughly $150 to $350 in most U.S. markets, though this varies a good deal by region. Early intervention, from birth to age three, is free under federal law, and school-based therapy is free through the IEP. Medicaid covers eligible children, and private insurance usually covers some sessions but often caps them annually or requires prior authorization. Telehealth can bring the cost down.

What is the Hanen program, and does it help with Down syndrome?

Hanen "More Than Words" is a structured parent training program originally built for children with autism and social communication challenges, and it has research support for Down syndrome as well. Parents go through group sessions and individual coaching to learn things like following the child's lead, using expectant pauses, and expanding on their communication attempts. A certified Hanen SLP typically runs the program, and cost varies by provider.

Should I use a speech-generating device with my child?

For many children with Down syndrome, yes. A speech-generating device or a full AAC app gives a child access to a whole vocabulary while their speech isn't yet intelligible or functional enough on its own. ASHA's position is that AAC should be considered whenever a child's communication needs aren't fully met by unaided speech, so it's worth introducing early rather than waiting for speech to fail first.

Does Down syndrome cause apraxia of speech?

Not universally, but it co-occurs in a meaningful number of children with Down syndrome. Apraxia is a motor planning disorder, separate from muscle weakness, where the brain struggles to sequence the movements speech requires. If a child shows inconsistent errors, does better with automatic speech than with direct imitation, and isn't progressing with standard articulation work, an apraxia evaluation makes sense, since the motor speech approaches used differ from standard articulation therapy.

How do I get speech therapy through the school?

Put your request for a special education evaluation in writing to your school district. Federal law (IDEA Part B) requires the district to evaluate within 60 days of that written request and, if your child qualifies, build an IEP that includes speech therapy. A Down syndrome diagnosis alone doesn't automatically create an IEP; the school evaluation has to happen first. If you disagree with what the school finds, you can request an independent educational evaluation at the district's expense.

What should I do if I think therapy isn't working?

Start by asking your SLP for measurable goals and actual data. Good therapy tracks progress systematically, and if the numbers show no movement over 8 to 12 weeks on a specific goal, something needs to change, whether that's the goal itself or the method. A consultation with a specialist who works specifically with Down syndrome is reasonable to request, and a second opinion is always fair game. Parents have the right to speak up in IEP meetings and push back on goals that feel inadequate.

Can children with Down syndrome learn to read, and does that help speech?

Yes to both. Children with Down syndrome often have stronger visual memory than verbal memory, and many read earlier than you'd expect given their spoken language level. Research from Down Syndrome Education International shows literacy instruction can actually drive gains in spoken language, and systematic phonics instruction works well for this population. Reading opens another route to vocabulary growth and gives a child a way to communicate through text when speech isn't clear.

Are there telehealth speech therapy options?

Yes, and telehealth has grown into a real, evidence-supported option, particularly for the parent coaching side of treatment. It's especially useful for families in rural areas or anyone who can't make in-person appointments work reliably. Many private SLPs now offer telehealth, some insurance covers it, and the interactive, naturalistic parts of therapy translate to video surprisingly well, especially for toddlers and young children where the parent is doing much of the work anyway.

Sources

  1. American Speech-Language-Hearing Association (ASHA), Down Syndrome page: Hypotonia and oral motor differences are primary contributors to speech intelligibility challenges in Down syndrome; ASHA covers feeding therapy in infancy as an early SLP role
  2. National Institutes of Health, MedlinePlus, Down Syndrome: Hearing loss, often conductive, affects an estimated 38 to 78 percent of children with Down syndrome
  3. Chapman RS. Language learning in Down syndrome: the speech and language profile compared with adolescents with cognitive impairment without Down syndrome. Down Syndrome Research and Practice, 2006: Verbal short-term memory is a consistent area of relative weakness in Down syndrome, contributing to the gap between receptive and expressive language
  4. Warren SF, Brady N. The role of maternal responsivity in the development of children with intellectual disabilities. Mental Retardation and Developmental Disabilities Research Reviews, 2007: Early naturalistic developmental behavioral interventions produce better language outcomes than delayed intervention; intensity of intervention matters
  5. U.S. Department of Education, IDEA Part C (Infants and Toddlers with Disabilities): IDEA Part C guarantees free early intervention services from birth through age two for children with diagnosed conditions including Down syndrome; services provided in the natural environment
  6. Kumin L. Speech intelligibility and childhood verbal apraxia in children with Down syndrome. Down Syndrome Research and Practice, 2006: A meaningful subset of children with Down syndrome also have childhood apraxia of speech, requiring motor speech intervention approaches
  7. American Speech-Language-Hearing Association (ASHA), Augmentative and Alternative Communication: ASHA's position is that AAC should be considered whenever a child's communication needs are not fully met by unaided means; non-speech oral motor exercises lack sufficient evidence for improving speech intelligibility
  8. Hanen Centre, More Than Words program: Parent-implemented strategies including expectant pause and following the child's lead are central to Hanen More Than Words, which has research support for children with Down syndrome
  9. Down Syndrome Education International, Reading and Language research: Literacy-based intervention and early reading instruction use visual memory strengths in Down syndrome and can drive spoken language gains
  10. DiGuiseppi C et al. Co-occurring conditions in Down syndrome. American Journal of Medical Genetics Part A, 2010: Estimates suggest 16 to 18 percent of people with Down syndrome may also meet criteria for autism spectrum disorder, though dual diagnosis is clinically complex
  11. U.S. Department of Education, IDEA Part B (School-Age Services): Under IDEA Part B, children ages 3 to 21 with disabilities including Down syndrome are entitled to a free appropriate public education including speech therapy through an IEP
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