What is mCLASS? Amplify's early literacy screening and progress-monitoring assessment explained
mCLASS is Amplify's teacher-administered K-8 literacy platform that delivers DIBELS 8th Edition screening and progress monitoring. It is not an IQ test.
Dr. Russell T. WarneChief Scientist
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mCLASS is a digital reading assessment and instruction platform sold by Amplify Education for kindergarten through eighth grade. It is the licensed digital version of DIBELS 8th Edition, the University of Oregon's set of one-minute early literacy measures, packaged with "universal screening" (testing every student to flag reading risk), "progress monitoring" (repeated short probes that track growth), dyslexia screening measures, and instructional recommendations. A classroom teacher or reading specialist administers it one-on-one, listening as a child names letters, segments sounds, and reads aloud while the software scores the responses. mCLASS is not an IQ test. It measures acquired reading skills, which instruction changes directly, rather than the general reasoning ability an intelligence test estimates. This article covers who makes mCLASS, what it adds to paper DIBELS, how a session runs, what the reports say, and where its limits lie.
Who makes mCLASS and how it relates to DIBELS
Amplify Education, a K-12 curriculum and assessment company active since 2000, publishes mCLASS. According to Amplify, mCLASS is "the only licensed digital provider" of DIBELS 8th Edition, and more than 4 million students have been assessed with the platform. The measures themselves come from the University of Oregon's Center on Teaching and Learning, which holds the DIBELS trademark, has led the research behind it for more than three decades, and released the 8th Edition in 2018.
The division of labor explains what a school is paying for. The University of Oregon provides paper-based DIBELS 8 materials as a free download. Amplify sells the delivery layer: printed kits, the DIBELS Data System for schools that test on paper and enter scores, and the mobile mCLASS version in which the teacher administers each measure on a tablet or laptop and the software scores, stores, and analyzes results in real time.
What an mCLASS assessment measures, grade by grade
Amplify's program details page lists each measure and its grade range. The core English measures are the DIBELS 8th Edition subtests, each timed at one minute.
• Letter Naming Fluency (LNF), grades K-1: naming printed letters as quickly as possible; Amplify notes it doubles as a "rapid automatized naming" task, a processing-speed skill dyslexia screening guidelines call for.
• Phonemic Segmentation Fluency (PSF), grades K-1: breaking spoken words into their individual sounds, the "phonological awareness" skill that underpins decoding.
• Nonsense Word Fluency (NWF), grades K-3: sounding out made-up words to test letter-sound knowledge without help from memorized words.
• Word Reading Fluency (WRF), grades K-3: reading real words quickly and accurately.
• Oral Reading Fluency (ORF), grades 1-8: reading an unpracticed passage aloud, scored for words correct and accuracy.
• Maze, grades 2-8: a silent comprehension task in which the student picks the correct word from choices embedded in a passage.
Testing time is short. The University of Oregon's administration guide reports about 4 to 6 minutes per kindergartner, 5 to 7 minutes per first grader, about 4 minutes in grades 2 and 3, and about 2 minutes in grades 4 through 8, plus 5 minutes of group time for Maze, and it cautions that DIBELS 8 is validated only for on-grade use. A Spanish counterpart, mCLASS Lectura, covers kindergarten through sixth grade with parallel measures and a dual-language report.
How a screening session and progress monitoring work
mCLASS follows the DIBELS benchmark calendar: the University of Oregon validated the benchmark forms for use up to three times a year, at the beginning, middle, and end of the school year. During a session the teacher sits with one child, presents each measure on the device, and marks responses as the child reads. Amplify describes the result as a transcript with "diagnostic error patterns," meaning the platform records which sounds or word types were missed as well as how many items were correct.
Between benchmarks, the platform supports progress monitoring for students below the benchmark goal. Amplify reports that mCLASS recommends which measure to monitor and sets a target through a "Zones of Growth" framework that draws on national data to estimate the growth rate a student needs to reach the end-of-year goal. According to Amplify's reporting guide, a summary report plots the three most recent scores against an "aimline" (a line from the current score to the goal) so a teacher can see whether an intervention is working before the next benchmark.
The platform also generates small-group recommendations from a library of more than 500 activities and places students into mCLASS Intervention, Amplify's Tier 2 and Tier 3 program for grades K-6. Coupling assessment with the vendor's own curriculum suits districts that want one supplier and draws fair criticism from those who prefer assessment to stay independent of the materials it evaluates.
Dyslexia screening measures added by Amplify
Amplify markets mCLASS DIBELS 8th Edition as "the industry's first all-in-one universal and dyslexia screener" and maps the DIBELS subtests onto International Dyslexia Association screening areas: rapid naming (LNF), phonological awareness (PSF), the alphabetic principle (NWF), word reading (WRF and ORF), and comprehension (Maze). Amplify adds optional measures at no extra cost.
• Vocabulary, grades K-3: knowledge of grade-level words and their meaning in text.
• RAN (Numbers), grades K-3: naming numerals aloud as quickly as possible.
• Oral Language, grades K-2: repeating sentences verbatim while the assessor notes errors.
A student whose composite score falls in the "Well Below Benchmark" range and who also scores Well Below Benchmark on RAN or Spelling receives a risk indicator icon. Amplify describes this as a signal that should prompt "further dyslexia screening evaluation if needed," and that caution is appropriate: a screener flags children who need a closer look, while a diagnosis of dyslexia or any other learning disability is made by a qualified clinician after a comprehensive evaluation.
Amplify argues that teacher observation reduces the over-identification that can occur when five-year-olds take silent computer tests, trading staff time for accuracy, a choice that sister platforms such as Acadience Reading also make.
What mCLASS scores and reports mean
Every benchmark produces a raw score for each measure and a composite score that combines them. The University of Oregon's guide lists five score types (raw scores, equated scaled scores, percentile ranks, growth zones, and composites), which mCLASS presents through color-coded performance levels.
• Above Benchmark and At Benchmark: on track, likely to meet grade-level standards with core instruction alone.
• Below Benchmark: somewhat behind, in need of strategic support.
• Well Below Benchmark: far behind, in need of intensive intervention.
According to the University of Oregon, the at-risk cut-score identifies, on average, 80 percent of students who go on to perform below the 20th percentile on an external reading measure at the end of the year, and the benchmark goal identifies 80 percent or more of students who end up below the 40th percentile. The labels are therefore predictions with a known miss rate, and a single benchmark score should be read as a probability rather than a verdict. Classroom reports also show each student's Lexile level and percentile for each skill, and a Home Connect letter explains results to caregivers in English or Spanish.
Amplify's aggregate data has also become a national barometer of early reading. Its June 2026 research brief, drawn from about 350,000 students in 1,800 schools across 43 states, reported that 66 percent of K-2 students finished the 2025-26 school year at or above benchmark and 22 percent were well below benchmark, up from 55 percent on track in 2020-21 but flat against the prior year.
How mCLASS differs from an IQ test, and what it cannot tell you
mCLASS belongs to the "curriculum-based measurement" tradition, in which brief, standardized samples of academic behavior indicate progress toward a general outcome. Its measures are deliberately narrow: how many letters, sounds, or words a child produces correctly in one minute. A 2020 meta-analysis in the Journal of School Psychology by Stacy-Ann January and David Klingbeil, covering 48 studies and more than 47,000 U.S. students in grades K-2, found that such measures correlated with broader reading outcomes at aggregated values from about 0.34 (phoneme segmenting) to about 0.75 (nonsense-word reading predicting oral reading). They predict reading well without being perfect.
An IQ test measures something different. Tests such as the Wechsler scales estimate general reasoning ability across verbal, spatial, memory, and speed tasks, and their scores are comparatively stable across the school years, whereas reading fluency is an acquired skill that instruction raises quickly. A child can be Well Below Benchmark on mCLASS in first grade and still have average or superior general ability; that pattern is one of the things a school psychologist looks for when a struggling reader is evaluated for a learning disability. Nothing in the platform estimates intelligence; our article on whether schools test for IQ covers when schools do measure ability directly.
For adults who want a normed measure of general reasoning, the RIOT IQ test, the Reasoning and Intelligence Online Test developed by RIOT IQ with psychometrician Dr. Russell T. Warne, is designed for people aged 18 and older. It contains 15 subtests across six cognitive indices (verbal reasoning, fluid reasoning, spatial ability, working memory, processing speed, and reaction time), takes about 52 minutes, and reports scores on the familiar mean-100, standard-deviation-15 scale. Like mCLASS, it does not replace an individually administered diagnostic evaluation. You can take the RIOT IQ test at riotiq.com.
Frequently asked questions
Is mCLASS an IQ test?
No. mCLASS delivers DIBELS 8th Edition measures of letter naming, phonemic awareness, decoding, word reading, oral reading fluency, and comprehension. It estimates reading skill and reading risk rather than general intelligence.
What grades use mCLASS?
Amplify lists mCLASS DIBELS 8th Edition for kindergarten through eighth grade; mCLASS Lectura and mCLASS Intervention cover kindergarten through sixth grade.
How long does an mCLASS assessment take?
Each measure takes one minute. The University of Oregon's administration guide puts the full benchmark battery at roughly 4 to 7 minutes per student in kindergarten and first grade and 2 to 4 minutes in later grades, plus 5 minutes of group time for Maze.
What is the difference between mCLASS and DIBELS?
DIBELS is the set of measures, owned by the University of Oregon and available free on paper. mCLASS is Amplify's licensed digital platform that administers those measures on a device, scores them instantly, adds dyslexia screening measures, and generates reports.
Does mCLASS diagnose dyslexia?
No. It screens for risk factors associated with dyslexia and flags students who may need further evaluation; a diagnosis requires a comprehensive assessment by a qualified clinician.
4. Amplify. (2026, June). Progress paused: What end-of-year data reveal about early literacy in grades K–2 [Research brief]. Amplify Education. amplify.com
5. University of Oregon. (n.d.). What is DIBELS? Center on Teaching and Learning. dibels.uoregon.edu
6. University of Oregon. (2023). DIBELS 8th Edition administration and scoring guide. Center on Teaching and Learning. dibels.uoregon.edu
8. January, S.-A. A., & Klingbeil, D. A. (2020). Universal screening in grades K-2: A systematic review and meta-analysis of early reading curriculum-based measures. Journal of School Psychology, 82, 103–122. doi.org
Hero photo: A pupil's hand on a tablet next to an open picture book in a classroom. Photo by FramaKa, via Wikimedia Commons, CC BY-SA 4.0 (cropped).
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