Backward Chaining

  • When ‘star’ sounds like ‘dar’: Understanding speech sound disorders and the path to clearer speech

    If your child says ‘dar’ instead of ‘star’, you might be wondering if they will simply outgrow it or if they require specialised support. While ‘cluster reduction’—dropping one of the sounds in a blend—is a normal part of learning to talk, we typically expect these sounds to lock into place by age four years. If these errors persist as a child approaches school age, it often signals a speech sound delay that may now no longer pass without help. As a Speech and Language Therapist, I specialise in helping children bridge this gap using evidence-based techniques like backward chaining.

    This isn’t about constant correction; it’s about providing the right clinical scaffolding to move a child from ‘frustrated’ to ‘fluent’ before they hit those critical early school years.

    Dropping sounds from words is a common feature of speech sound difficulties, and while it can look small on the surface, it can have a big impact on how clearly a child is understood. In this short video clip, I’m working with a child on an /ST/ sound cluster, demonstrating how I use an evidence-based speech therapy technique called backward chaining to help children build clearer speech with confidence.

    What’s actually happening when a child drops the ‘S’?

    Clusters like /ST/, /SP/, and /SK/ are tricky. They require:

    • precise timing
    • careful airflow
    • and the ability to blend sounds smoothly

    For many children, especially those with speech sound difficulties, this is a big ask.

    So instead of hearing:

    ‘star’

    we might hear:

    ‘tar’ or ‘dar’

    This isn’t laziness or refusal. It’s the child simplifying the word to make it manageable.

    Why I don’t start by saying ‘say star’

    Telling a child to ‘just add the S’ rarely works.

    Instead, I meet them where they are already successful.

    In this clip, the child can already say ‘dar’ clearly. That’s our starting point.

    Backward chaining: building speech from success

    Backward chaining means we:

    1. Start with the part of the word the child can already say
    2. Gradually add the missing sound
    3. Keep the child feeling successful at every step

    So rather than jumping straight to ‘star’, we:

    • secure the ending
    • gently introduce the /S/
    • and blend it in a way that feels achievable

    This approach reduces frustration, builds confidence, and helps the sound stick not just in the therapy room, but out in the real world.

    Why this matters beyond one word

    This isn’t just about saying ‘star’.

    It’s about:

    • teaching the mouth a new movement pattern
    • giving the brain time to organise the sound sequence
    • and helping the child feel capable, not corrected

    When therapy feels safe and successful, children are far more likely to generalise their new sounds into everyday speech.

    Speech therapy works best when children feel supported not tested.

    If your child struggles with speech clarity

    If your child:

    • drops sounds from words
    • avoids longer or trickier words
    • or becomes frustrated when they’re not understood

    This is the kind of work I do every day building speech step by step, in a way that respects each child’s pace and strengths.

    Support can be gentle, effective, and empowering.

    If you’d like to learn more about how speech therapy can support your child, you’re always welcome to get in touch.

    Sonja McGeachie

    Highly Specialist Speech and Language Therapist

    Owner of The London Speech and Feeding Practice.


    Health Professions Council registered
    Royal College of Speech & Language Therapists Member
    Member of ASLTIP

    Find a speech and language therapist for your child in London. Are you concerned about your child’s speech, feeding or communication skills and don’t know where to turn? Please contact me and we can discuss how I can help you or visit my services page.

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  • · ·

    Chaining: A powerful tool for phonological development

    Understanding chaining

    Chaining is a therapeutic technique I like to use in my speech therapy work with children who have Childhood Apraxia of Speech (CAS) or phonological speech sound difficulties. It helps to break down a complex target behaviour into smaller, more manageable steps. By systematically teaching and reinforcing each step, I can help my students achieve their communication goals.

    There are two types of chaining: Forward and backward chaining

    Today I am going to show and talk about backward chaining. This technique involves starting with the last step and working backward to the first. This approach can be particularly effective for children with persistent speech sound difficulties where combining consonants into clusters, such as /BL/ or /FR/ or /SHR/ is very difficult.

    Backward chaining allows my student to experience immediate success and build his confidence.

    In my video I show you how I applied backward chaining to the words ‘Shriek’, ‘Shrub’, ‘Shrimp’ etc

    My student struggles with both the /SH/ and the /R/ sounds and we have been working on both sounds for some weeks now. He has mild Childhood Apraxia of Speech and he has difficulties with coordinating his tongue movements, breathing and using his jaw effectively to make words. His sound repertoire has grown a lot since we started working together last year. Today in this session I show you how we pulled both the sound /SH/ together with /REEK/ to make ‘SHRIEK’. I love using the pictures and therapy materials from Adventures in Speech Pathology.

    This is also part of the Complexity approach which I will explain in a separate blog post.

    • Step 1 (not shown in the video): I explain what the word means; I find that when my student understands what a word means he is much better at saying it. It increases his confidence and motivation to say a word that he knows the meaning of. Often this student does not tell me that he does not know what a word means, so I always remind myself to check that out first.
    • Step 2 (not shown in the video): We do a little rhyming game and think about what any one word rhymes with: ‘Shriek’ – ‘meek’, ‘weak’, ‘seek’.
    • Step 3: I show my student that there are two parts to this word /reek/ and the sound /SH/.
    • Step 3: We practise the easier part: /reek/ /reek/ /reek/.
    • Step 4: We add the /SH/ sound and pull it together to make our target word ‘Shriek’.

    /REEK/ /REEK/ /REEK/ + /SH/ = ‘SHRIEK’
    /RUB/ /RUB/ /RUB/ + /SH/ = ‘SHRUB’
    /RUG/ /RUG/ /RUG/ + /SH/ = ‘SHRUG’

    By breaking down the word into smaller, manageable steps, my student can focus on each syllable individually, get that right and then gradually build up to the full word. This approach can help to reduce frustration and increase motivation.

    Forward chaining

    Forward chaining is the same process but in reverse: we start with the front sound or syllable and work forward towards the next/last part of the word:

    /SH/ + /REEK/ = ‘SHRIEK’
    /SH/ + /RUB/ = ‘SHRUB’
    /SH/ + /RUG/ = ‘SHRUG’

    Benefits of chaining

    • Increased motivation: By starting with the last step, my student experiences success, which boosts his motivation to continue trying to say the word and trying other words.
    • Reduced frustration: Breaking down the target behaviour into smaller steps can make the task less overwhelming, reducing frustration and anxiety.
    • Improved confidence: As the little learner masters each of the step, his confidence and self-esteem increases. Again, this leads to increased motivation.
    • Faster learning: By focusing on the final step first, and practising lots of chaining (forward and backward), a student can quickly learn to generalise to other words.

    Backward chaining (and forward chaining) is a really great tool for teaching complex speech sounds and words to children with phonological disorders.

    Watch out for my next blog which is all about the complexity approach in Phonology.

    Do get in touch if your child has a speech sound disorder, I would love to help.

    Any questions or need help with supporting your little one’s language please contact me via my contact form, or you could also check out www.hanen.org for advice and lots of inspiration.

    Sonja McGeachie

    Early Intervention Speech and Language Therapist

    Feeding and Dysphagia (Swallowing) Specialist The London Speech and Feeding Practice

    The London Speech and Feeding Practice


    Find a speech and language therapist for your child in London. Are you concerned about your child’s speech, feeding or communication skills and don’t know where to turn? Please contact me and we can discuss how I can help you or visit my services page.

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