Imagine listening as a third grader breezes through a story—the student reads out loud effortlessly, with accuracy, phrasing, and expression. How did they get there?
One key building block of fluent reading of connected text is being able to reading words quickly in isolation—which can be measured through nonsense word fluency and practiced through activities like word chains and blending lines.
In this post, we’ll cover why fluency with isolated words matters, how it can be measured, and what you can do to develop it.
Why Fluency with Isolated Words Matters
Fluency (meaning good accuracy and good rate) isn’t just about reading words quickly for the sake of reading words quickly. The ability to read unfamiliar words quickly and accurately is foundational to comprehension. When readers aren’t spending effort decoding the words, that effort can be put toward thinking about the meaning of the text. Isolated word practice strengthens decoding muscles in a way that builds stamina and confidence in connected text.
Nonsense Word Fluency: A Window into Decoding
One screening task that gives us a window into a child’s ability to decode well in isolation is nonsense word fluency (NWF). NWF is used in systems like Acadience in kindergarten through grade 2. It assesses students’ ability to apply phonics to novel, simple words.
In this task, students decode words like lat, mip, and fud for one minute. From listening and recording a student’s response, we’re able to see which words/sounds they read correctly (accuracy) as well as how many words/sounds they read correctly in one minute (rate). The reason why nonsense words are used is that we can be sure that students haven’t been exposed to these words before (unlike real words like had, nut, kid), so it’s a true task of decoding.
By looking at a Nonsense Word Fluency score, we can see if a child is on track in early word reading skills.
Supporting Word Reading Fluency
Word Chains for Blending Practice: Small Shifts, Big Gains
Word chains are sequences of words that change one sound-spelling at a time. For example can –> cane –> cone –> con. When using word chains for blending/reading practice, students look at and read the words as the teacher changes just one grapheme (sound spelling) at a time.
The benefits of word chains are that they heighten students’ flexibility and reinforce decoding without rote memorization. They encourage attention to each sound-spelling pattern in the word. Word chains are a great bridge between sound manipulation and fluent word reading.
To do this, you can use magnetic letters, letter cards or tiles, slides with the words pre planned, a whiteboard and dry erase marker, or a digital tool like UFLI’s Virtual Blending Board.
Blending Lines: Building Fluency with Purpose
Blending lines are rows of decodable words that are sometimes ordered strategically. Students read from left to right and top to bottom. Blending lines can be read repeatedly across a week. (We believe the term and concept were coined by Wiley Blevins). As students revisit blending lines, they build automaticity through repetition and reinforcement of sound-symbol relationships. Check out this resource to learn more. (Tip: Daffodil Hill Press books all have blending lines to go with them. Bit by Bit and Los Narcisos Collections include spiral bound and printable blending lines, while Purposeful Practice Collections have blending lines embedded on the inside front cover of the book.)
From Isolation to Integration: The Transfer to Connected Text
Research shows that isolated word reading predicts later success in connected text. Students who read isolated words with fluency and transfer that ability into connected text can focus on meaning.
So, connect the dots: From phonics learning to word-level fluency to ease and comprehension in real reading.
Classroom Application
To embed practice with word level reading in order to develop fluency within your classroom, you might rotate through word level routines as warm ups in small or large groups, or even send these opportunities home. This could look like:
- Mondays – Word chain
- Tuesdays/Wednesdays – Blending lines
- Thursdays – Timed Practice
- Fridays – Application to decodable text
In Conclusion: Fluency Work is Meaning Work
Practicing words in isolation isn’t about drilling. It’s about giving kids the tools they need to make decoding texts more effortless and more meaningful.
Try It Out
Try one blending line or word chain activity this week—tag @daffodilhillpress to share how it went!
- Our Free eBooks page includes an option to get 12 printable blending lines and lesson plans for these books emailed to you.
- Check out our Purposeful Practice line for fluency tools that go from isolation to story or informational text in ten minutes or less.

