Reading fluency techniques that actually work, by age

Last updated 2026-07-09

What is reading fluency, and why does it matter so much?

Fluency sits right in the middle of the reading road. A child who is still decoding every word slowly has no mental energy left to think about what the text means. Fluency frees up that cognitive load so comprehension can happen.

The National Reading Panel defined reading fluency as reading text "with speed, accuracy, and proper expression" ^[1]. Those three parts matter together. A child can be fast and sloppy, or slow and accurate, and still struggle to comprehend. The target is all three at once.

Researchers call the relationship between fluency and comprehension bidirectional. More fluency leads to better comprehension, and more reading experience builds more fluency. The two feed each other. That is why fluency is not a side issue for a struggling reader. It is the engine.

Fluency is also measurable. Schools most commonly use a one-minute oral reading fluency (ORF) probe, sometimes called a DIBELS measure or a CBM (curriculum-based measurement). A student reads a grade-level passage aloud for exactly one minute; the examiner counts words read correctly per minute (WCPM). Hasbrouck and Tindal (2017) published the most widely used WCPM norms, and those numbers appear below in the chart section ^[2].

If your child's WCPM score is below the 50th percentile for their grade, that is the signal to act. A score below the 25th percentile usually means the school should be providing targeted intervention.

What are the most effective reading fluency techniques?

The National Reading Panel reviewed the research in 2000 and found that "guided oral reading procedures that had students read passages orally with guidance and feedback" reliably improved fluency ^[1]. That finding has held up across two decades of follow-on research. Here are the specific methods with the strongest evidence behind them.

Repeated oral reading. The child reads the same short passage (usually 100-200 words) aloud several times until they hit a fluency target. Research consistently shows that rereading the same text improves both reading rate and accuracy, and the gains transfer to new passages ^[1]. Three to four reads of the same passage in one sitting is a reasonable practice dose.

Paired or partner reading. A fluent reader (parent, older sibling, tutor, or a stronger peer) reads aloud alongside the child, matching the child's pace. The fluent reader provides immediate correction when the child stumbles, then the child rereads the same sentence. Topping's studies on paired reading showed an average gain of roughly 3.4 months of reading age per month of intervention for the tutee ^[3].

Readers Theater. Students rehearse a script over several days and then perform it. Because there is a real purpose for rehearsing (performance), children reread the text many more times than they would otherwise. Multiple studies show meaningful fluency gains from Readers Theater programs, with no comprehension cost ^[4].

Echo reading. The adult reads a sentence or short phrase aloud with expression; the child immediately echoes it back, trying to match the pace and prosody. This is especially useful for children who read in a flat, word-by-word monotone because it directly models what fluent reading sounds like.

Recorded reading or audio-assisted reading. The child follows along with a high-quality audio recording of a text while reading the print version. The audio models fluent pace and expression. This is not passive listening. The child must track every word. Some research suggests audio-assisted reading is helpful for children with dyslexia specifically, because it lets them access grade-level text while decoding skills are still developing ^[5].

Wide reading. Independent reading of self-selected, easy text (at or below independent reading level) builds fluency over time. This is not the same as assigned reading. The text needs to be genuinely easy, meaning 95 percent or more of words are known on sight. If a child is stopping to sound out more than 1 word in 20, the book is too hard for fluency practice.

A note of honesty: silent reading alone, without feedback, has a weaker evidence base than oral practice methods for students who are not yet fluent ^[1]. This does not mean silent reading is bad. It means it is not the primary tool for a child who is still building fluency.

How many words per minute should my child be reading? (Grade-level norms)

Parents often ask for a number, and there is a real answer. Hasbrouck and Tindal compiled ORF norms from a large national dataset and updated them in 2017 ^[2]. The table below shows the 50th percentile (median) WCPM targets for fall, winter, and spring of each grade. These are the numbers most school reading specialists use.

Grade	Fall 50th %ile	Winter 50th %ile	Spring 50th %ile
1	(not normed)	23	53
2	51	72	89
3	71	92	107
4	94	112	123
5	110	127	139
6	127	140	150
7	128	136	150
8	133	146	151

Source: Hasbrouck and Tindal (2017), University of Oregon ^[2]

A few things to notice here. First, growth slows considerably after 4th grade. The jump from 2nd to 3rd grade spring (89 to 107 WCPM) is bigger than the jump from 6th to 7th grade spring (150 to 150 WCPM). Second, these are medians, not minimums. A 3rd grader reading 85 WCPM in spring is below the median but may not need intensive intervention if accuracy is strong and comprehension is solid. Context matters.

For 1st grade reading comprehension and 2nd grade reading comprehension, fluency norms in that table are the most practical benchmarks parents can use at home.

Accuracy matters as much as rate. A child who reads 120 WCPM but makes 10 errors per minute has an accuracy rate of roughly 92 percent, which is in the instructional range, not the independent range. You want to see 95 percent accuracy or better for true independent fluency.

How do I practice reading fluency at home?

You do not need a curriculum or special software. You need 15 to 20 minutes, a passage at the right level, and a consistent routine.

Here is a simple repeated reading protocol you can do tonight:

1. Pick a passage of 100-150 words at your child's instructional level (a book where they can read roughly 90-94 percent of words correctly on a first read). Grade-level basal readers, library easy readers, or reading comprehension passages all work. 2. Time a cold read. Set a timer for one minute and count words read correctly. Write it down. 3. Read it together once at your pace, pointing to words as you go. 4. Have your child read it again independently. Time it again. Celebrate the improvement, even if it is small. 5. Do one more read for expression. Ask your child to read it like a newscaster, or like a spooky story.

Four reads of the same passage in one sitting is plenty. More than that produces diminishing returns and frustration.

For home practice that goes a little further, the ReadFlare reading toolkit includes level-matched fluency passages with built-in word count markers, which takes the guesswork out of finding texts at the right level. That said, you can absolutely do this with library books and a sticky note to mark the one-minute endpoint.

Prosody practice is often overlooked at home. Prosody is the expression and rhythm part of fluency, the part that sounds like natural speech. Try phrase-marked reading: write out a sentence and use slash marks to show where to pause (/). Children who read in a flat word-by-word monotone often find this visual cue genuinely helpful before they internalize the pattern.

For children working on sight words, fluency practice and sight word mastery go together. High-frequency words that are instantly recognized reduce the decoding burden on every single sentence, which directly raises reading rate.

What fluency techniques work best for kids with dyslexia?

Children with dyslexia face a specific challenge: phonological decoding is slow and effortful, which keeps reading rate low even after they have learned the decoding rules. Fluency does not come automatically once decoding is taught. It needs its own explicit practice.

The International Dyslexia Association notes that students with dyslexia often need more repetitions to achieve automaticity than their peers ^[5]. That means repeated reading protocols are especially important, not less important, for this population.

Audio-assisted reading is particularly worth trying for kids with dyslexia. Because dyslexia involves the phonological processing pathway, giving the child an auditory model of the text reduces the cognitive bottleneck while still requiring them to track print. Studies reviewed by the What Works Clearinghouse found positive effects for students with reading disabilities when audio support was combined with print tracking ^[4].

Multisensory fluency methods also help. Some structured literacy programs have the child tap syllables, clap phrases, or use a finger to mark their place as a way of chunking text into meaningful units rather than trudging word by word.

One thing to watch: if a child with dyslexia is reading slowly but accurately, the first question is whether decoding is still effortful, meaning phonics instruction may still be the priority. Fluency intervention works best after foundational decoding is established, at roughly the 90 percent accuracy threshold. Pushing rate before accuracy is solid tends to increase errors and hurt confidence.

If your child has an IEP, fluency is often an appropriate measurable annual goal under IDEA ^[6]. ORF WCPM paired with an accuracy percentage is a concrete, quantifiable metric that makes a good IEP goal. For example: "By the end of the school year, [child] will read a grade-level passage aloud at 90 WCPM with 95% accuracy on 3 out of 4 trials."

What does the research actually say about repeated reading?

Repeated reading is the single most studied fluency intervention. The National Reading Panel's 2000 report, which synthesized research across thousands of studies, found that guided repeated oral reading had "a significant and positive impact on word recognition, fluency, and comprehension across a range of grade levels" ^[1]. That is about as strong a research endorsement as reading science offers.

A 2017 meta-analysis by Stevens, Walker, and Vaughn found that repeated reading interventions produced a mean effect size of approximately 0.75 for reading fluency outcomes in elementary students with learning disabilities ^[7]. An effect size above 0.40 is generally considered meaningful in educational research. A 0.75 is strong.

The key mechanism is automaticity, described in LaBerge and Samuels' 1974 model of automatic information processing in reading ^[8]. When word recognition becomes automatic (meaning it requires minimal conscious attention), the reader's working memory is available for comprehension. Repeated reading builds automaticity through practice with the same text until recognition is effortless.

One honest caveat: most repeated reading studies are short-term, lasting weeks to a few months. There is less research on long-term maintenance of fluency gains after intervention ends. The working assumption among specialists is that continued wide reading maintains gains, but nobody has clean data on the exact dose needed.

How does reading fluency connect to reading comprehension?

The connection is more than theoretical. Fuchs et al. (2001) found that ORF scores were among the strongest predictors of reading comprehension scores on standardized tests, explaining roughly 80 to 90 percent of the variance in comprehension outcomes for elementary students ^[9]. That correlation is extraordinary by social science standards.

The reason is the bottleneck model. Human working memory has limited capacity. When a child is working hard to decode each word, those cognitive resources are not available for the higher-level work of understanding sentences, making inferences, or tracking a narrative. Fluency removes the decoding bottleneck so comprehension can happen.

Prosody adds another layer. A child who reads with appropriate expression, pausing at commas, rising at questions, is processing syntactic and semantic cues. Flat, expressionless reading is often a sign that the child is not integrating meaning as they go.

If your child reads fluently but still struggles to understand, the issue has shifted from fluency to comprehension strategy. That is a different problem with different solutions. For that path, how to improve reading comprehension covers the strategy instruction side.

For older students, say 4th grade and up, 4th grade reading comprehension and 6th grade reading comprehension address the point where content-area text demands start outpacing fluency gains.

Can reading fluency problems be a sign of a learning disability?

Yes, and this is worth taking seriously. Persistent, significant fluency problems, especially when a child has received good instruction, are one of the hallmark signs of dyslexia.

The DSM-5 describes specific learning disorder with impairment in reading as including "inaccurate or slow and effortful word reading" as a core symptom ^[10]. Slow, effortful reading that does not improve at the expected rate with instruction is a clinical red flag.

Under IDEA 2004 (20 U.S.C. § 1400 et seq.), schools are required to identify children with suspected learning disabilities and conduct a free evaluation within a specific timeline after a parent's written request (typically 60 days, though timelines vary by state) ^[6]. If your child has received fluency intervention for a full semester with little progress, you have every right to request a full evaluation in writing.

The school's data matters here. ORF progress monitoring data collected over 8 to 10 weeks of intervention, plotted on a graph showing rate of improvement against a goal line, is the kind of evidence that should inform whether a referral is warranted. Ask to see that data. Schools are required to provide it.

A formal evaluation can include tests of phonological processing, rapid automatized naming (RAN), working memory, and reading rate, all of which help distinguish between a fluency problem that responds to practice and one rooted in a processing difference that requires specialized instruction.

If you're not sure how your child's scores compare to grade-level expectations, a reading comprehension test or standardized fluency screening administered by the school or a private educational psychologist will give you the baseline you need.

What fluency support should be in an IEP or 504 plan?

If your child has an IEP under IDEA, fluency is a legitimate and measurable area for annual goals and specialized instruction. Under 20 U.S.C. § 1414(d), an IEP must include measurable annual goals and describe the special education services the child will receive ^[6]. Fluency fits neatly into both.

A good IEP fluency goal looks like this: "Given a grade-level reading passage, [student] will read aloud at [X] WCPM with [Y]% accuracy on 3 out of 4 consecutive probes by [date]." That gives you a specific, measurable, time-bound target the school must track.

The IEP should also specify how often fluency is being addressed (frequency and duration of services), what intervention program is being used, and who is delivering it. "The teacher will work on reading" is not a service description. "30 minutes of repeated reading intervention, 4 days per week, delivered by the reading specialist" is.

For 504 plans, fluency accommodations might include extended time on reading assessments, access to audiobooks or text-to-speech for content-area reading, and permission to use oral rather than written response formats. A 504 does not require specialized instruction, but it does require meaningful accommodations that give the student equal access.

One tactical note: if you request an IEP meeting to discuss fluency goals and the school says fluency is not covered under the student's disability category, push back. IDEA requires services based on a child's needs, more than their disability label. Federal IDEA guidance on IEP development supports this: "The IEP must be designed to meet the child's unique needs" ^[6].

Parents who want help preparing for these conversations may find the ReadFlare parent advocacy kit useful. It includes sample letters requesting evaluations, IEP meeting checklists, and a guide to reading progress monitoring data.

What tools and programs do teachers use for fluency instruction?

Several evidence-based programs have a documented track record in classrooms. Here is an honest overview.

RAVE-O (Retrieval, Automaticity, Vocabulary, Engagement, Orthography) is a classroom fluency and comprehension program with randomized controlled trial support ^[11]. It combines repeated reading with vocabulary and word study.

Read Naturally is a widely used intervention that combines audio modeling, repeated reading, and progress monitoring. The What Works Clearinghouse reviewed Read Naturally and found positive or potentially positive effects for students with learning disabilities ^[4].

DIBELS Next is not an intervention but a progress monitoring tool. Schools use it to screen all students and track ORF over time. If your school uses DIBELS, you can ask for your child's individual score reports at any time.

Six Minute Solution is a peer-mediated repeated reading program that pairs students for timed practice. It is low-cost and manageable for classroom teachers, which is part of why it is popular.

Recorded books and text-to-speech tools are used widely as accommodations. Bookshare (bookshare.org) provides free accessible ebooks for students with qualifying print disabilities in the US, including those with IEPs ^[12].

For home-based reading comprehension practice, most fluency work does not require a program at all. The repeated reading protocol described earlier is free and takes 20 minutes.

An honest opinion on cost: many fluency software platforms charge $10-$30 per month per student and deliver essentially the same repeated reading protocol you can do with a library book and a timer. The exception is platforms with strong progress monitoring dashboards that generate data in the format your child's school needs for IEP documentation. That feature may justify the cost if you're building a private documentation trail.

How long does it take to improve reading fluency?

This is the question parents ask most urgently, and the honest answer is: it depends, but you should see measurable progress within 6 to 8 weeks of consistent, targeted practice.

Research on fluency interventions generally shows improvements within 10 to 15 sessions of repeated reading practice ^[7]. Topping's paired reading data showed an average gain of 3.4 months of reading age per month of intervention, with typical programs running 15 to 30 sessions ^[3]. Those are good-news numbers.

For children with dyslexia or a documented learning disability, progress is often slower and requires more repetition to consolidate. These students frequently need 6 to 12 months of targeted fluency work alongside phonics instruction before gains become reliably stable.

The most important variable is consistency. Fifteen minutes of fluency practice five days a week produces better outcomes than 75 minutes once a week. The research on distributed practice is clear on this point across many skill domains.

If your child has been in a fluency intervention for 10 or more weeks with minimal progress (meaning their WCPM growth rate is flat), that is the signal to change something: the program, the text level, the intensity, or the underlying diagnosis. Flat progress monitoring data over 8 to 10 weeks is one of the key triggers for requesting a special education evaluation under IDEA ^[6].

For a reading tutor working one-on-one, progress tends to be faster than in group intervention, partly because the tutor can adjust text level and method in real time. If home practice and classroom intervention are both showing slow progress, one-on-one tutoring with a specialist in structured literacy is worth considering.

Are there reading fluency techniques specifically for older students?

By the time a student hits 5th or 6th grade, fluency problems are often masked. These kids have developed coping strategies: they avoid reading aloud, they take much longer on tests, they understand more when they listen than when they read. The underlying fluency gap is still there.

Repeated reading still works for older students, but the texts need to be age-appropriate, even if the reading level is below grade. Nobody wants to reread a picture book in 6th grade. Short articles, sports stats, song lyrics, and scripts from TV shows all work for repeated reading at any age.

For 6th grade reading comprehension, the fluency challenge shifts: texts get longer, vocabulary gets denser, and content-area reading (science, social studies) has its own discipline-specific syntax. Fluency practice with those specific text types, more than narrative fiction, is what pays off.

Readers Theater is surprisingly effective with middle schoolers because it has a clear social purpose. A 6th grader who would never voluntarily reread a passage will happily rehearse a script for performance.

For high school students, the focus often shifts from rate to prosody and phrasing, since most students have hit the WCPM ceiling for their grade. Oral reading for expression, debate practice, and podcast-style recording projects all build prosody in a format that feels relevant.

One program with evidence for older struggling readers is LANGUAGE! by Sopris Learning, which has been studied with middle school populations with learning disabilities ^[4]. The What Works Clearinghouse reviews are a reliable source for checking program evidence levels; the direct URL is ies.ed.gov ^[13].

Frequently asked questions

What is the difference between reading fluency and reading comprehension?

Fluency is the ability to read accurately, at a steady pace, and with expression. Comprehension is the ability to understand and think about what you just read. Fluency enables comprehension by freeing up working memory, but the two are distinct skills. A child can be a fluent reader who does not comprehend deeply, and a slow reader who understands everything they get through.

How do I know if my child's reading fluency is below grade level?

The most practical tool is the Hasbrouck and Tindal WCPM norms. Have your child read a grade-level passage aloud for one minute and count correct words. Compare to the 50th percentile target for their grade and time of year. A score below the 25th percentile generally signals the need for targeted intervention. Your child's school may already have DIBELS or CBM data they can share with you.

What is repeated reading and does it actually work?

Repeated reading means a child reads the same short passage several times until they hit a fluency target. Yes, it works. The National Reading Panel found it had a significant positive impact on word recognition, fluency, and comprehension across grade levels. A 2017 meta-analysis found a mean effect size of approximately 0.75 for fluency outcomes, which is considered a strong result in education research.

How often should we practice reading fluency at home?

Five days a week, 15 to 20 minutes per session, is the target. Distributed daily practice produces better results than longer but less frequent sessions. One repeated reading session with 3 to 4 reads of the same passage is a solid daily dose. Consistency over weeks and months matters more than any single session length.

Can fluency problems be a sign of dyslexia?

Yes. Slow, effortful reading that does not improve at the expected rate despite good instruction is one of the core signs of dyslexia. The DSM-5 includes inaccurate or slow and effortful word reading as a diagnostic criterion for specific learning disorder with impairment in reading. If fluency is not responding to intervention after a full semester, request a formal school evaluation in writing.

What should a fluency goal in an IEP look like?

A good IEP fluency goal is specific and measurable. An example: 'Given a grade-level reading passage, the student will read aloud at 95 WCPM with 95% accuracy on 3 out of 4 consecutive probes by [date].' It should specify the text level, the WCPM target, an accuracy percentage, the number of trials needed to confirm mastery, and a timeline tied to the annual review date.

Does listening to audiobooks help build reading fluency?

Audiobooks alone, without following the print, do not build reading fluency directly because there is no decoding practice. Audio-assisted reading, where the child tracks every word in the printed text while listening, does have research support, especially for children with dyslexia. The child must actively follow along, more than listen passively. Bookshare provides free accessible ebooks for students with qualifying print disabilities.

What reading fluency programs do schools typically use?

Common programs include Read Naturally, Six Minute Solution, and RAVE-O. Schools also use DIBELS for progress monitoring. Read Naturally has positive or potentially positive evidence for students with learning disabilities from the What Works Clearinghouse. For older students, LANGUAGE! has been studied with middle school populations. Not every program is equally matched to every student, so ask the school what evidence base they are using.

What is prosody and why does it matter for fluency?

Prosody is the expression, rhythm, and phrasing in oral reading. It is the difference between reading that sounds like natural speech and reading that sounds like a list of unconnected words. Prosody matters because it reflects whether the reader is integrating meaning while reading. Children who read in a flat monotone are often not processing syntax as they go, which limits comprehension even when rate and accuracy are adequate.

At what reading level should fluency practice texts be?

For fluency-building, texts should be at the child's independent or easy instructional level, meaning the child can read 93 to 97 percent of words correctly on a first pass. If a child is stopping to sound out more than roughly 1 word in 20, the book is too hard for fluency practice. Texts that are too hard build frustration, not fluency. Easy text read well and fast builds the automaticity that transfers to harder texts over time.

Can Readers Theater really improve fluency?

Yes, the research supports it. Readers Theater works because it gives children a genuine reason to reread a text many times: public performance. The rehearsal process produces the same repeated reading benefits as structured intervention, but kids experience it as preparation for a show rather than remediation. Multiple studies show meaningful fluency gains, and it works across a wide age range from 2nd grade through middle school.

Is silent reading good for building fluency?

For students who are not yet fluent, silent reading has a weaker evidence base than guided oral reading with feedback. The National Reading Panel's review found insufficient evidence to claim that unguided silent reading alone improves fluency. For already-fluent readers, wide independent reading maintains and extends fluency. The distinction matters: silent reading is a good habit but not a substitute for targeted fluency practice for a struggling reader.

How long before I see improvement from fluency practice?

Most research on repeated reading shows measurable gains within 6 to 10 weeks of consistent daily practice. Topping's paired reading research found average gains of about 3.4 months of reading age per month of intervention. For children with dyslexia, progress is often slower and may take 6 to 12 months to consolidate. If progress monitoring data is flat after 8 to 10 weeks of intervention, the program or approach needs to change.

What is an oral reading fluency (ORF) probe and how is it scored?

An ORF probe is a one-minute timed oral reading of a grade-level passage. The examiner counts every word the child reads correctly in 60 seconds; the score is words correct per minute (WCPM). Errors include substitutions, omissions, and words the child cannot read within 3 seconds. Self-corrections count as correct. Schools use these regularly with tools like DIBELS Next. Parents can request their child's scores at any time.

Sources

1. National Institute of Child Health and Human Development, Report of the National Reading Panel (2000): Guided oral reading procedures that had students read passages orally with guidance and feedback reliably improved fluency, word recognition, and comprehension across grade levels.
2. Hasbrouck, J. and Tindal, G. (2017), University of Oregon, ORF Norms: Grade-level oral reading fluency norms (WCPM) by grade and percentile, fall/winter/spring, used as the primary benchmark for fluency screening in US schools.
3. Topping, K.J. (2001), Peer Assisted Learning: A Practical Guide for Teachers, Brookline Books: Paired reading interventions produced an average gain of approximately 3.4 months of reading age per month of intervention for the tutee.
4. What Works Clearinghouse, Institute of Education Sciences, U.S. Department of Education: Read Naturally received positive or potentially positive evidence ratings for students with learning disabilities; Readers Theater and LANGUAGE! also reviewed.
5. International Dyslexia Association, Knowledge and Practice Standards: Students with dyslexia typically require more repetitions to achieve automaticity than peers, and audio-assisted reading combined with print tracking has positive support for students with reading disabilities.
6. U.S. Department of Education, Individuals with Disabilities Education Act (IDEA), 20 U.S.C. § 1400: IDEA requires schools to conduct free evaluations, develop IEPs with measurable annual goals, and design services based on a child's unique needs; evaluation timelines and IEP content requirements specified in statute.
7. Stevens, E.A., Walker, M.A., and Vaughn, S. (2017), The Effects of Reading Fluency Interventions on the Reading Fluency and Reading Comprehension Performance of Elementary Students with Learning Disabilities, Journal of Learning Disabilities 50(5): Meta-analysis of repeated reading interventions found a mean effect size of approximately 0.75 for reading fluency outcomes for students with learning disabilities.
8. LaBerge, D. and Samuels, S.J. (1974), Toward a Theory of Automatic Information Processing in Reading, Cognitive Psychology 6(2): The automatic information processing model explains that when word recognition becomes automatic, working memory is freed for comprehension; repeated reading builds this automaticity.
9. Fuchs, L.S., Fuchs, D., Hosp, M.K., and Jenkins, J.R. (2001), Oral Reading Fluency as an Indicator of Reading Competence, Scientific Studies of Reading 5(3): ORF scores explained roughly 80 to 90 percent of the variance in reading comprehension outcomes for elementary students, making it among the strongest predictors of comprehension on standardized tests.
10. American Psychiatric Association, Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5): The DSM-5 describes specific learning disorder with impairment in reading as including inaccurate or slow and effortful word reading as a core diagnostic criterion.
11. Wolf, M. and Bowers, P.G., RAVE-O Program, Tufts University: RAVE-O is a classroom fluency and comprehension program combining repeated reading with vocabulary and word study that has randomized controlled trial support.
12. Bookshare, an Accessible Books Consortium service funded by the U.S. Department of Education: Bookshare provides free accessible ebooks for students with qualifying print disabilities in the US, including those with IEPs.
13. Institute of Education Sciences, U.S. Department of Education, What Works Clearinghouse: The What Works Clearinghouse is the authoritative federal source for reviewing evidence levels of educational programs including fluency interventions.