Lisp Exercises: Step-by-Step Practice for a Clearer S

✓ Reviewed against ASHA Practice Portal, Flipsen et al. (2013), McCauley et al. (2009), Allen (2013)Evidence level BLast reviewed October 14, 2026Published October 14, 2026

Lisp exercises work on the S itself: find the right tongue spot (just behind the top teeth), make a long, sharp S, then build it into syllables, words, phrases, and sentences — a few minutes most days. They suit a frontal lisp best; a wet, slushy lateral lisp usually needs an SLP to set up the placement first.

First: which lisp is it?

Exercises depend on the type. A frontal lisp (tongue between the teeth, S sounds like TH) and a dentalized lisp (tongue pressed on the back of the teeth, S sounds dull) are both made too far forward, and structured home practice suits them well. A lateral lisp (wet, slushy S, air over the sides of the tongue) and a palatal lisp (hissy, SH-like S) usually need a speech-language pathologist to set up the placement first.¹

Age matters too: S and Z are acquired at 4;0–4;11 at the 90% criterion in US data, so a forward S in a 3-year-old is often just development.⁶

Step 1: find the tongue spot

1Find the ridge. Run the tongue tip along the roof of the mouth just behind the top front teeth — the bumpy ridge is the S spot.
2Teeth together, lips in a smile. Lightly closed teeth keep the tongue from slipping forward.
3Tongue tip up and back, behind the teeth — never touching or poking between them.
4Check in a mirror: you should see teeth, not tongue.

SLPs use exactly this kind of visual and tactile feedback. ASHA lists a mirror for visual feedback of placement, tactile cues such as a tongue depressor, and — for stubborn errors — ultrasound or palatography that shows where the tongue touches.¹

Step 2: the long-S drill

Hold a sharp “sssss” for three seconds — like a snake or a tire leaking.
Feel the air: hold a fingertip in front of the center of the lips. The air should hit the middle, not the sides.
Listen for the sound: sharp and high, not thick (TH-like) and not wet.
Ten long S sounds, rest, ten more.

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Use T as a launch pad

If S keeps coming out as TH, say “t-t-t” with the tongue behind the teeth, then hold the last one into a hiss: “t-sssss.” The T puts the tongue in the right place first.

Step 3: climb the ladder

Lisp exercise ladder (establishment → generalization, ASHA).
Level	Practice	Example
Syllables	S + vowel, then vowel + S	“see, say, so, sue” · “ace, ice, oss”
Words — start	S at the beginning	sun, soap, sock, seal, sit
Words — end	S at the end	bus, house, kiss, juice, yes
Words — middle	S in the middle	messy, pencil, bicycle, lesson
Phrases	Two or three words	“six socks,” “a nice house”
Sentences	Read or repeat	“Sam sees the sun.”
Conversation	Natural talk	Two minutes about your day, focusing on S

Lisp exercise ladder (establishment → generalization, ASHA).¹

Move up a level when S is clear about 8 times out of 10 on two separate days. ASHA describes this progression — from establishing the sound to carrying it over at increasingly challenging levels — as the core of speech sound treatment.¹

Lisp test words — S and Z word lists
Printable S worksheets
S-blends — the next step after single S

How often to practice

Short and frequent works better than long and rare. In a randomized trial of 54 preschoolers with speech sound disorders, three sessions a week for 8 weeks produced better results than the same total amount spread over 24 weekly sessions. Motor learning principles — how much practice, how it is scheduled, and the feedback given — shape how well a new movement sticks.^4,7

With an SLP, even short sessions can work: in a preliminary study of 18 children aged 6;9 to 11;10 with forward S sounds, once-weekly 10-minute sessions produced significant gains, and most children kept them two years later. In a case study of an adolescent with a persistent frontal lisp, direct training with visual-acoustic biofeedback led to notable improvement maintained at four months.^2,5

What to skip

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Tongue workouts

Tongue push-ups, blowing exercises, and “tongue strengthening” are often sold as lisp exercises. A systematic review found insufficient evidence that nonspeech oral motor exercises change speech.

That conclusion comes from an evidence-based systematic review of 15 studies of oral motor exercises.³

Free Lisp Test

Not sure which lisp it is? Check for the classic frontal and lateral patterns in 2 minutes.

Try it free →

When to see an SLP

The S is wet or slushy (lateral) or hissy and SH-like (palatal).
Your child cannot make a clear S even when copying you.
A frontal lisp is still present well past age 5.
Four to six weeks of regular practice have not changed anything.

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How S practice works in SpeechStep

For S, SpeechStep practice is listen-and-compare: record the word, hear it next to a clear model, and judge it together, with an optional human review. An instant AI check is offered for R only.

ASHA’s consumer page describes what an SLP evaluation involves; find a certified SLP through ASHA ProFind.^8,9

Frequently asked questions

What exercises help a lisp?＋

Exercises that practice the S sound itself: placing the tongue tip just behind the top teeth, making a long sharp S, then using it in syllables, words, phrases, and sentences. ASHA describes this progression as establishing the sound and then generalizing it to increasingly challenging levels. Non-speech mouth exercises are not a substitute.

How long does it take to fix a lisp with exercises?＋

It varies. In one study of 18 children aged 6;9 to 11;10 with forward (dentalized or interdental) S sounds, once-weekly 10-minute sessions with an SLP over 15 weeks produced significant gains, and most children kept them two years later. Daily home practice between sessions helps carry the sound into everyday speech.

Can you fix a lateral lisp with exercises at home?＋

Usually not alone. In a lateral lisp the air escapes over the sides of the tongue, and practicing without first establishing the correct placement tends to rehearse the error. An SLP can set up central airflow first; home exercises then reinforce it.

Do tongue strengthening exercises help a lisp?＋

There is no good evidence that they do. A systematic review found insufficient evidence to support or refute nonspeech oral motor exercises for changing speech. Spend practice time on the S sound itself.