When it comes to early reading instruction, not all decodables are created equal.

A great decodable text is intentionally crafted so that the _vast majority of words_ align with what students have been explicitly taught, allowing them to successfully sound out and apply new phonics knowledge in context.

Below, we'll unpack the key features of a high-quality decodable using a LitLab story aligned to **UFLI Lesson 13 (/d/):** [Dot and Dad](https://www.litlab.ai/library/cm6fbp55n000hqobkwoxvznqv?sequence=ufli&ref=gallery_item_staff_pick)**.**

### Aligned to a Phonics Sequence

Every strong decodable text is anchored to a systematic phonics scope and sequence, such as **UFLI Foundations** or **CKLA**, ensuring that the words students encounter can be sounded out using previously taught patterns.

For example, if students have learned short vowel sounds and the letters _d_ and _t_, a sentence like _"Dad did it!"_ allows them to apply those skills successfully. This alignment gives students the structure they need to read independently and confidently, without guessing.

Research shows that the **degree of decodability** in a text strongly predicts both _reading accuracy and fluency_. In a large-scale study, **Saha et al. (2021)** found that text decodability uniquely predicted students' oral reading performance, even after accounting for decoding ability.

Across thousands of LitLab stories:

-   **Median decodability:** 96%
-   **All decodables** are aligned to a specific lesson in a phonics scope and sequence (from early CVC to vowel teams)

This tight alignment helps students apply new sound–spelling patterns without encountering untaught ones. Every LitLab story is fully aligned to a phonics sequence, ensuring that most words can be successfully sounded out.

![Example of aligned decodable text 1](https://storage.googleapis.com/litlab-assets/blog/2025_10_15_great_decodable/body_fig1.png)

![Example of aligned decodable text 2](https://storage.googleapis.com/litlab-assets/blog/2025_10_15_great_decodable/body_fig2.png)

### Focuses on a Target Skill — with Natural Repetition

A hallmark of great decodables is the **intentional density of skill words**.

Decodables should provide natural, frequent exposure to the target phonics pattern being practiced.

For example, if the lesson focuses on **\-ck**, the story might include several words like _duck_, _chuck_, and _tuck_. This repetition gives students multiple chances to apply the same phonics feature in varied contexts, building automaticity without sacrificing story flow.

The best decodables weave these repetitions seamlessly into engaging sentences, so practice feels like _real reading_, not drill.

### Non-Decodable Words Are Pre-Taught

Even the most controlled stories include a few words that can't yet be sounded out — such as _is_ or _the_ (often called **Heart Words**).

Most of the time, these are high-frequency words that have already been explicitly taught within the scope and sequence.

These words should be practiced _before reading_ so they don't interrupt decoding flow.

Pre-teaching them ensures that students can focus on applying the target phonics skill while still experiencing authentic, meaningful text.

![Pre-teaching example](https://storage.googleapis.com/litlab-assets/blog/2025_10_15_great_decodable/body_fig3.png)

![Picture supports comprehension](https://storage.googleapis.com/litlab-assets/blog/2025_10_15_great_decodable/body_fig4.png)

### Pictures Enhance the Narrative

In well-crafted decodable texts, illustrations **enhance comprehension without replacing decoding**.

Pictures help students connect meaning to the words they're reading and stay engaged, especially when a story includes new or conceptually rich details.

In the LitLab example above, students can decode the word _"it"_ and use the illustration to infer that _"it"_ refers to the jar. The word "_jar_" may not yet be decodable at early levels, so it is not included in the text. The image provides helpful context without serving as a guessing cue.

### Balanced, Engaging, and Teacher-Friendly

A high-quality decodable doesn't just support students. It supports _teachers_, too.

Beyond maintaining strong phonics control (typically **85–95% decodable**) and telling stories that make sense, great decodables make their structure transparent to the teacher.

Teachers should be able to easily see:

-   **Target skill words** — words that include the phonics pattern being practiced (e.g., _duck, pack, back_ for the **\-ck** skill)
-   **Non-decodable "story words"** — words not yet fully decodable but necessary for meaning
-   **High-frequency words** — previously taught sight words that reappear for fluency and familiarity

Clear categorization helps teachers preview texts, plan instruction, and pre-teach strategically, ensuring every story aligns with what's been taught.

**In LitLab,** each story clearly labels its target skill and categorizes all words by skill words, review words, high-frequency words, and non-decodable ("story") words. Teachers know exactly what students will encounter before reading.

This transparency keeps instruction consistent and empowers teachers to use decodables as both a reading and teaching tool, not just a text to hand out.

## Ready to Explore High-Quality Decodables?

A great decodable is more than controlled text. It's _purposeful practice_ that builds confident readers.

At **LitLab**, that balance is built in. Every story is:

-   Aligned to a phonics scope and sequence
-   Verified for decodability
-   Tagged with skill words, high-frequency words, and story words
-   Designed to make phonics practice both _accurate_ and _joyful_

By combining phonics precision, clear teacher supports, and engaging stories, LitLab makes it easy to choose texts that truly match instruction.

👉 **Explore high-quality decodable stories at [LitLab.ai](https://litlab.ai)**

_Written by: Drew McCann, K-3 Literacy Specialist and Head of Learning at LitLab.ai, and Jacqueline Ontell, Elementary Teacher, Special Education & Curriculum Development_

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\[1\] Saha, N. M., Cutting, L. E., Del Tufo, S. N., & Bailey, S. (2021). Initial validation of a measure of decoding difficulty as a unique predictor of miscues and passage reading fluency. _Scientific Studies of Reading_, _25_(5), 404–418. [https://doi.org/10.1080/10888438.2020.1817093](https://doi.org/10.1080/10888438.2020.1817093)

Learn the key features of high-quality decodable texts that support student reading success and teacher effectiveness.

What makes a great decodable text?

LitLab was built to make high-quality decodable reading practice effortless for teachers, and that begins with aligning to the phonics instruction schools already trust. For many classrooms, that foundation is **UFLI Foundations**, a research-based phonics program grounded in the **Science of Reading** and widely used across K-3.

This post explains how **LitLab ensures precise, data-verified alignment with UFLI Foundations** through every word students encounter. Using decodability analysis across thousands of stories, you’ll see how **LitLab maintains over 95% decodability throughout the complete UFLI sequence**. The result is simple: teachers get rigorously aligned materials that fit their existing instruction, and students gain quality and engaging reading practice that builds confidence, fluency, and mastery one skill at a time.

## Why UFLI Alignment Matters

[UFLI (University of Florida Literacy Institute) Foundations](https://ufli.education.ufl.edu/foundations/) offers a structured scope and sequence that teaches phonics systematically from simple to complex patterns. Teachers using UFLI need materials that match that progression precisely.

According to research, the level of decoding difficulty in a text is a unique and significant predictor of both miscues and passage reading fluency (_Saha et al., 2021_). In other words, when students encounter phonics patterns they haven’t yet been taught, they’re more likely to struggle with accuracy and fluency during oral reading.

This highlights the importance of tightly controlled, skill-aligned texts—like those in LitLab—where decodability is optimized.

Practicing newly learned grapheme-phoneme correspondences (GPCs) in context helps solidify decoding skills. Research shows that students who practice taught GPCs in decodable texts apply more letter-sound knowledge strategies when reading less controlled or authentic texts later on (_Mesmer, 2008_). In short, highly decodable reading builds transferable skills.

That’s where **LitLab’s alignment with UFLI** makes a difference.

Every UFLI story in LitLab is built around a specific UFLI lesson, carefully controlling for phonics patterns so that students encounter only those they’ve been explicitly taught.

## How LitLab Ensures UFLI Decodability

At LitLab we've developed a **phonics-aware AI assistant** that helps us create decodable stories that adheres very tightly to the target skill and prior skills from the UFLI Foundations scope and sequence. **Each story in LitLab’s Grab-and-Go Decodable Library is created and evaluated by an educator who is an expert in the Science of Reading.**

A cornerstone of this process is ensuring high decodability. What is decodability? Decodability is the percentage of words that can be decoded by a student using the patterns a student has been taught up to that point. This concept is a cornerstone of UFLI Foundations and followed strictly for all LitLab stories.

We measure this using the same phoneme-grapheme correspondence progression defined by UFLI. The result: highly controlled texts that maintain readability, coherence, and instructional alignment.

## The Data: How Decodable Are LitLab Stories?

To quantify how closely LitLab aligns with UFLI, we analyzed thousands of stories across the entire UFLI sequence. The results speak for themselves.

### 1\. Median Decodability by UFLI Skill

How tightly aligned are LitLab’s stories to UFLI’s skills and pedagogy?

![Median Decodability by UFLI Skill](https://storage.googleapis.com/litlab-assets/blog/2025_10_10_ufli_alignment/body_fig1.png)

Not only does LitLab offer numerous stories for each UFLI skill, the data above shows that **across all 128 UFLI Lessons, LitLab stories maintain a median decodability above 90%**, with most skills exceeding 95%. Each point on this chart represents the median decodability for stories tagged to that skill, meaning that nearly all words in those stories can be decoded using that skill and prior knowledge.

This demonstrates **consistency across the full scope and sequence**, ensuring teachers can trust that LitLab stories remain tightly aligned from early short vowels through advanced vowel teams and r-controlled syllables.

### 2\. Story Decodability Distribution

How decodable are LitLab’s stories?

![Distribution of Story Decodability](https://storage.googleapis.com/litlab-assets/blog/2025_10_10_ufli_alignment/body_fig2.png)

The above figure shows the distribution by decodability for all UFLI-aligned decodables that are available to educators in LitLab’s Grab-and-Go Decodable Library. The higher the count of stories in a decodability bucket, the more stories LitLab has to offer teachers at that decodability level. First, notice that there are no stories in LitLab’s staff-curated grab-and-go decodable library with a decodability lower than 75%. **LitLab’s UFLI-aligned stories maintain a median decodability above 97%**, with fewer than 5% of all LitLab UFLI-aligned stories having a decodability below 86%.

In other words, **nearly all stories are highly decodable**, and even the lowest 5% maintain strong alignment to UFLI’s principles and pedagogy. This provides teachers flexibility to differentiate (beyond skill-level), by using the most controlled texts for early practice or slightly more open texts for fluency and comprehension work.

### 3\. Story Length vs. Decodability

But are all LitLab stories created equal?

![Story Length vs Decodability](https://storage.googleapis.com/litlab-assets/blog/2025_10_10_ufli_alignment/body_fig3.png)

The above scatter plot shows the decodability (y-axis) as a function of the number of words in each story (x-axis) on LitLab. The graph shows that **LitLab stories remain consistently decodable regardless of length**. Even as word count increases from early 30-word CVC stories to more advanced 400-word passages, decodability stays above 90%. An analysis shows the correlation between Word Count and Decodability was 0.06, which indicates no significant correlation between these two variables. This means teachers can confidently assign longer stories for fluency and comprehension without compromising their instructional practice.

## What This Means for Classrooms

For teachers, the takeaway is simple: **LitLab fits directly into UFLI-based phonics instruction without adding extra steps or guesswork.** Every decodable story in LitLab has already been analyzed for decodability, tagged by UFLI lesson, and verified to stay within the phonics patterns students have been taught.

Teachers can:

-   **Search by UFLI lesson or skill** to instantly find stories that reinforce that day’s instruction.
-   **Assign or print stories with confidence**, knowing every text meets rigorous decodability thresholds.
-   **Use decodability metrics** to choose the right level of challenge for each group or individual reader.
-   **Create new stories** with LitLab’s story generator, which automatically aligns to the same UFLI skill progression used in the Grab-and-Go Library.

For administrators, this alignment ensures **instructional consistency and data-backed quality** across classrooms. Schools can be confident that all decodable materials, whether created by staff or selected from LitLab’s library, follow the same structured phonics framework. This reduces variation between teachers, supports fidelity to UFLI, and strengthens overall reading outcomes.

In short, LitLab makes it easy to bring **rigorous, Science of Reading aligned practice** to every student. Teachers spend less time searching for the right materials and more time teaching. Students spend more time reading stories that match what they have learned, building both **accuracy and fluency** in authentic, engaging contexts.

Together, UFLI and LitLab provide the **structure and scalability** schools need to turn systematic phonics instruction into confident, joyful reading.

## Ready to See UFLI Alignment in Action?

Explore the full [UFLI-aligned Grab-and-Go Decodable Library](https://www.litlab.ai/gallery/v2?author=staff&sequence=ufli) and see how LitLab supports your district’s literacy goals with precise, consistent phonics practice.

_Written by: Drew McCann, K-3 Literacy Specialist and Head of Learning at LitLab.ai_

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\[1\] Saha, N. M., Cutting, L. E., Del Tufo, S. N., & Bailey, S. (2021). Initial validation of a measure of decoding difficulty as a unique predictor of miscues and passage reading fluency. _Scientific Studies of Reading_, _25_(5), 404–418. [https://doi.org/10.1080/10888438.2020.1817093](https://doi.org/10.1080/10888438.2020.1817093)

\[2\] Mesmer, H. A. E. (2008). _Tools for matching readers to texts: Research-based practices_. New York, NY: Guilford Press.

See how LitLab maintains 97%+ median decodability across all 128 UFLI Foundations lessons — with the data to prove it.

How LitLab Aligns to UFLI Foundations — Backed by Data

When working with early readers, decodable texts are a powerful tool to support phonics-based reading instruction. But even the most carefully constructed decodable story often contains a few words students haven’t yet fully mastered. That’s where previewing (or pre-teaching) comes in. Thoughtfully selecting which words to introduce before reading can make the difference between a choppy decoding experience and a confident, successful read. It is also a way to introduce unfamiliar vocabulary, helping students build strong comprehension of the text.

An analysis has shown that LitLab stories are highly decodable, with an average decodability greater than 95%, leaving just a handful of words in each story that may require previewing or pre-teaching with students. In this post, we’ll share a clear framework for selecting words to pre-teach using LitLab Stories as an example — but the principles apply across any decodable instruction.

## Why Preview Words?

-   **Fluency and confidence:** Removing stumbling blocks allows students to apply their decoding skills smoothly and prevents word guessing.
-   **Comprehension:** Knowing a key word’s meaning helps students follow the story or text without confusion.

## A Framework for Previewing Words

Here are the criteria we suggest when selecting 3–5 words to preview:

**1\. Out-of-sequence words**  
These are words that may be phonetically irregular (said, does, was) or phonetically regular (play, house, take), but haven’t been introduced yet in your phonics sequence. While LitLab stories are highly controlled to include word patterns and sight words already taught, these words sometimes appear in LitLab Stories and other decodables to make sentences more natural.

**2\. Words Critical to Comprehension**  
Sometimes a word is essential for understanding the plot or characters, even if it’s rare or outside the students’ decoding range. Previewing it can have a huge impact on your student’s comprehension of the story.

## How to Preview Effectively

**For vocabulary words:**

1.  Say it aloud and have students repeat.
2.  Show it in context in the story.
3.  Give a short, student-friendly definition.
4.  Ask a question to connect it to their experience.
5.  Optional: act it out or use a quick sketch.

**Out-of-sequence words:**

1.  **Say it** – Say the word and use it in a sentence.
2.  **Hear it** – Stretch out and say each sound you hear.
3.  **Map it** – Match sounds to letters as you write the word.
4.  **Mark it** – Put a heart over the tricky part you must “learn by heart.”
5.  **Show it** – Show students where they will see it in the story.

## Concrete example: Pre-teaching words for a decodable story (Shan Helps Pick Up Trash)

Below is an example from the LitLab Story, [Shan Helps Pick up Trash](https://www.litlab.ai/library/cm8ypen250051l003cqs1e5gz).

![Preview example](https://storage.googleapis.com/litlab-assets/blog/2025_10_10_pre-teach/body_fig1.png)

### Steps to Choose Words to Preview

1.  Find vocabulary words that are critical to understanding the story.
2.  Find words that are non-decodable.
3.  Check how many times each word repeats.
4.  Select the words that appear most frequently and are crucial to understanding the text.

#### Step 1: Find vocabulary words

-   compost
-   recycle

#### Step 2: Find non-decodable words

-   compost
-   day
-   earth
-   recycle

LitLab will do this step for you! You can find non-decodable words in the “Words to pre-teach” section of the vocabulary guide.

![Vocabulary guide](https://storage.googleapis.com/litlab-assets/blog/2025_10_10_pre-teach/body_fig2.png)

#### Step 3: Note the frequency of the words

-   compost (1x)
-   day (1x)
-   earth (1x)
-   recycle (1x)

#### Step 4: Select words to pre-teach

-   **compost** — Why? crucial to understanding the text
-   **recycle** — Why? out-of-sequence word with a prefix that is also crucial for understanding
-   **earth** — Why? out-of-sequence word

If a word only appears one time and you think it might be familiar to students, or it's not crucial to the meaning of the text, you may want to choose a word that appears more frequently to preview instead.

## Keep It Simple. Keep It Purposeful.

Previewing doesn’t mean front-loading every unfamiliar word. In this example, we didn’t preview the word “day” even though it is an out-of-sequence word because it is a familiar word often used in the classroom.

Use this time to support meaning and confidence — not to rob the story of its decodable power. With practice, you’ll quickly learn which words need to be pre-taught and which should be left for students to decode.

Want to try it out? Browse our LitLab Stories and try previewing three words before reading with your class. Tag us with your annotated story!

👉 Explore decodable stories at [LitLab.ai](https://www.litlab.ai/)

_Written by: Jacqueline Ontell, Elementary Teacher, Special Education & Curriculum Development_

A practical framework for selecting 3–5 words to preview so students read decodable texts with confidence and comprehension.

Literacy insights for district and school teams

All Posts

What makes a great decodable text?

How LitLab Aligns to UFLI Foundations — Backed by Data

How to Choose Which Words to Pre-Teach for Decodable Texts