Does Text to Speech Stop Students Learning to Read?

The third objection, and the one with the most research behind the answer:

"If it reads to her, she is not working on her reading."

Like the others, it contains something true. It applies to a narrower slice of reading than the person saying it usually means.

This is part of a series on assistive technology pushback, starting with is assistive technology cheating?

Reading is decoding plus comprehension

Reading research splits reading into two strands that develop separately:

1. Decoding — turning marks on a page into words. Phonics, blending, recognising words on sight.
2. Comprehension — understanding what those words mean together. Vocabulary, inference, background knowledge, following an argument.

You need both. But they are not the same skill, they are taught differently, and a student can be strong at one and weak at the other.

That is the whole situation with dyslexia. Decoding is effortful and slow. Comprehension is frequently fine or excellent — sometimes well above grade level. The student can understand a text far more complex than the one they can decode.

Text to speech bypasses decoding. It leaves comprehension completely intact.

A student listening to a chapter still has to hold the argument in their head, follow the sequence, infer what is not stated, connect it to what they already know. Every part of comprehension is still being exercised. Nothing has been done for them except the part they were already spending all their effort on.

What the evidence shows

Research on text to speech with students who have reading difficulties finds:

• Improved comprehension for many students with reading and language difficulties.
• Reduced reading time and reduced cognitive effort, while comprehension holds at least level with silent reading.
• The largest benefits for students with the weakest decoding, which is what you would expect if the mechanism is bypassing decoding.

That second finding is worth sitting with. Even where comprehension scores do not rise, students get to the same understanding for less effort. For a student who arrives at period five already exhausted from reading, that is not a small result. Stamina is a real constraint on a school day.

The evidence is not uniform, and saying so makes the case stronger. Some studies find clear comprehension gains, others find the benefit is mainly in effort and speed, and results vary by the type of reading difficulty. Anyone claiming text to speech always raises comprehension is going beyond the research.

If you want something citable for a colleague, the IRIS Center at Vanderbilt (opens in a new tab) has a free teacher-facing module on assistive technology.

What this looks like: Josh, Year 8 science

Josh reads at roughly two years below his year group. His science comprehension is fine — ask him about photosynthesis and he will explain it. Getting through the chapter is the problem, and by the time he has decoded it he has nothing left for the questions at the end.

His lesson with Helperbird:

1. Clear the page. The textbook is on a publisher site wrapped in menus, a cookie banner and a related-articles rail. Reading Mode reduces it to the chapter text. For a student who is already spending everything on decoding, removing the visual noise is not cosmetic.

2. Set the page up for his eyes. He has a saved accessibility profile — OpenDyslexic at his spacing, with a soft yellow color overlay. One click, every page, no fiddling. The reading ruler tracks the line he is on so he stops losing his place mid-paragraph.

3. Listen and follow. Text to speech reads the chapter with each word highlighted as it is spoken. He is looking at the words the whole time. He gets through it in eleven minutes instead of forty, and still has attention left for the questions.

4. Hit a hard paragraph. The section on the light-dependent reaction does not land. He opens it in Immersive Reader, which adds line focus and syllable breaks, and reads that paragraph slowly. Helperbird brings Immersive Reader to every browser, not only Microsoft apps, so it is available on the publisher's site too.

5. The worksheet is a scanned PDF. His teacher shares a photocopied worksheet — an image, so text to speech has nothing to read. He uses the Screenshot Reader to pull the text out of it, and it picks up the equations automatically alongside the prose. Now the worksheet can be read aloud like anything else.

Josh did the same science lesson as everyone else. What changed is that he arrived at the questions with something left in the tank.

Step 5 is the one worth flagging to a SENCO or AT team. Scanned worksheets and photographed textbook pages defeat most reading tools completely, and they are everywhere in schools. A reader that cannot handle them leaves a gap the student falls into every week.

The word-highlighting detail matters

One thing worth knowing, because it changes how you set the tool up.

Text to speech that highlights each word as it speaks is not the same as an audiobook. The student sees the word and hears it at the same moment, repeatedly, across everything they read.

That is a pairing of print and sound — which is, structurally, what a lot of decoding instruction is trying to build. It is not a replacement for phonics teaching and nobody should claim it is. But "listening instead of reading" is not an accurate description of what is happening on screen when the words are lit up in front of the student as they go.

A student following highlighted text is looking at the words.

What it does not do

It does not teach decoding. If a student has a decoding goal, they need explicit, structured instruction to meet it — text to speech is not that and will never become that. Nor should it replace decoding practice. Both things belong in the same week: structured decoding work in its own session, and text to speech for the science chapter so that science does not stop while reading catches up.

That second point is the one that resolves most of this argument. The choice is not "learn to read" or "use text to speech". A student who cannot yet decode a grade-level text still has to learn science, history and geography, and those subjects do not pause. Text to speech is how they keep learning everything else while decoding instruction continues.

Blocking it does not produce more decoding practice. It produces a student falling behind in science.

The bit teachers often have not considered

Ask a sceptical colleague how they get through professional reading.

Podcasts on the commute. A document read aloud while driving. Skimming an abstract before deciding whether to read the paper. Listening to an article at 1.5x.

Adults use these constantly and do not consider themselves to be not reading. Amy Hatto, the occupational therapist whose question prompted this series, put it exactly this way: adults use assistive technology resources all the time, and then have a hard time with children using them.

That is worth naming gently in a staff meeting. Not as a gotcha — as a genuine prompt to notice the double standard.

Talking points to share with a team

• Reading is decoding plus comprehension. Text to speech bypasses decoding and leaves comprehension fully in play.
• Comprehension is usually what you are teaching in a content lesson. It is untouched.
• Dyslexia is frequently a decoding difficulty with intact comprehension — the student can understand far more than they can decode.
• Research finds better comprehension for many students, and less effort for almost all of them. Stamina counts across a school day.
• Word highlighting means the student is looking at the words. It is not an audiobook.
• Both belong in the week. Structured decoding instruction and text to speech for content subjects.
• Blocking it does not create decoding practice. It creates a student behind in science.
• We do this ourselves. Podcasts, documents read aloud, skimmed abstracts.

Why Helperbird for this

The thing that usually decides whether a reading tool survives contact with a school week is whether it can read what the week actually contains. Scanned worksheets, photographed textbook pages and locked PDFs are everywhere, and most tools stop dead at all three because there is no text to read. Helperbird's Screenshot Reader pulls the text out of an image and picks up equations automatically alongside the prose, so those stop being the weekly dead end they usually are.

Coverage matters in the same way. Microsoft's Immersive Reader is excellent and normally lives inside Microsoft apps; Helperbird brings it to the publisher site, the exam board and the news article, which is where the reading actually is. And because an accessibility profile saves a student's font, spacing, overlay and voice and applies it everywhere in one click, there is no reconfiguring per site — which is the quiet reason students give up on tools that otherwise worked.

Most of this costs nothing. Text to speech, dyslexia-friendly fonts, color overlays, the reading ruler and Reading Mode are free forever, with no account needed, so a student can try the whole setup in the next lesson without anything being purchased or approved first.

Text to speech, dyslexia fonts, color overlays and reading mode are free forever, so a student can try them today without anything being procured. Schools can cover everyone through Helperbird for Education, and teachers can get Pro free.

Back to the start of the series: is assistive technology cheating?