Screen and intervene faster with mCLASS DIBELS 8th Edition: California SB 114 Approved
California educators, mCLASS is one of three approved screeners in California for Reading Difficulties at K–2 for both English and Spanish.
mCLASS® DIBELS® 8th Edition is an all-in-one system for Science of Reading-based universal screening, Reading Difficulties screening, progress monitoring, and instruction for grades K-6. Amplify’s Spanish language assessment, mCLASS Lectura, works in tandem with DIBELS 8th Edition’s English assessments. Together, these assessments help teachers understand where their Spanish-speaking students are on their path to biliteracy.
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About the program
mCLASS offers teacher-administered assessment, intervention, and personalized instruction for grades K–6. Know exactly how to monitor and support every student in your classroom, with features like:
- Precise one-minute measures based on over three decades of predictive data.
- Universal and Reading Difficulties screening in one tool.
- Instruction that highlights observed patterns and recommends activities.
- Robust reports for teachers, specialists, administrators, and parents.

The right measures at the right time
With mCLASS DIBELS 8th Edition, you’ll assess students based on grade-specific curriculum and instructional standards, in accordance with International Dyslexia Association (IDA) guidelines.
mCLASS DIBELS 8th Edition offers one-minute, easy-to-administer measures of processing speed, phonological awareness, alphabetic principle, and word reading.
DIBELS® 8th Edition subtest alignment with SB 114 requirements |
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RDRP Screening Area | mCLASS DIBELS 8th Edition Measure | Grade K | Grade 1 | Grade 2 | Grade 3 | Grade 4–6 |
Rapid naming ability | Letter Naming Fluency (LNF) | |||||
Phonological awareness | Phoneme Segmentation Fluency (PSF) | |||||
Alphabetic principle | Nonsense Word Fluency (NWF) | |||||
Word reading | Word Reading Fluency (WRF) | |||||
Word reading | Oral Reading Fluency (ORF) | |||||
Comprehension | Maze | |||||
Language Comprehension | Oral Language | |||||
Vocabulary | Vocabulary | |||||
RAN | Rapid Automatized Naming (Numbers) | |||||
Encoding | Spelling | OPTIONAL |
Validated as a universal screener and a reading difficulties screener
Strong reliability and validity evidence shows that DIBELS 8th Edition can effectively assess students in key skills linked to both dyslexia and broader reading difficulty. The research supporting DIBELS 8th Edition, conducted by the University of Oregon, is rigorous, meets high technical standards, and empowers educators to make well-informed decisions.
Read the DIBELS 8th Edition Dyslexia White Paper.
A complete system for data-based decision making

mCLASS DIBELS 8th Edition provides rich data that helps you make informed instructional decisions and seek out further Reading Difficulties screening evaluation if needed.
- Assess skills: mCLASS DIBELS 8th Edition with dyslexia measures in Rapid Automatized Naming (RAN), Spelling, Vocabulary, and Oral Language accurately assess students’ abilities.
- Identify risk: The DIBELS 8 composite score shows each student’s risk level, with ‘Well Below Benchmark’ indicating a need for intensive support. Students who are also ‘Well Below Benchmark’ in RAN and/or Spelling have an additional Risk Indicator icon next to their name.
- Provide instruction: The mCLASS Instruction feature analyzes student error patterns to key dyslexia-related subtests, then recommends small groups and explicit, multi-sensory activities for reinforcing skills..
- Progress monitor: mCLASS includes progress-monitoring measures to track student growth in letter sounds, alphabetic principle, word reading, oral reading fluency, and comprehension, so that informed instructional decisions can be made.
- Adapt instruction: mCLASS displays indicators based on progress monitoring performance that indicate when a change in instruction may be needed. It also updates instruction recommendations using the latest data.
Differentiated literacy instruction
mCLASS DIBELS 8th Edition lays the groundwork for a strong Multi-Tiered System of Supports (MTSS).
In addition to identifying students at risk for reading difficulties, mCLASS DIBELS 8th Edition data recommends early intervention, personalized instruction, and core instruction within Amplify’s early literacy suite. Based on the Science of Reading, Amplify’s early literacy suite programs follow an explicit and systematic structure, build knowledge, and instruct on all of the foundational skills essential to literacy development.
- Intervene with mCLASS Intervention and Amplify Tutoring: Staff-led Tier 2 and 3 intervention for intensive support.
- Practice with Boost Reading: Personalized learning program to extend and reinforce core instruction.
- Instruct with Amplify Core Knowledge Language Arts (CKLA): Core curriculum to build foundational skills and knowledge.

Bilingual Reading Difficulties screening
By assessing with mCLASS DIBELS 8th Edition and its Spanish counterpart, mCLASS Lectura, you’ll know with confidence whether a student truly shows signs of of reading difficulties or is experiencing difficulties learning a new language.
When used together, mCLASS DIBELS 8th Edition and mCLASS Lectura feature a Dual Language Report that analyzes Reading Difficulties screening results in both languages. The report also details how each student can leverage their strengths from one language to support growth in the other.

Equal skill coverage in English and Spanish
mCLASS Lectura subtest alignment with SB114
RDRP screening areas | English measure | Spanish measure | Description* |
Letter Naming and RAN | Letter Naming Fluency (LNF) | Fluidez in nombrar letras (FNL) | Grades K–1: Naming letters in print. 1 minute, 1:1 administration. |
Phonological Awareness (Segmentation) | Phonemic Segmentation Fluency (PSF) | Fluidez en la segmentación de sílabas (FSS) & Fluidez en la segmentación de fonemas (FSF) | Grades K–1: Hearing and using sounds or syllables in spoken words. 1 minute, 1:1 administration. |
Phonological Awareness (Elision) | – | ¿Qué queda? (QQ) | Grades K–2: Produce the part of a word that remains after deleting a syllable or phoneme. 1 minute, 1:1 administration. |
Letter Sound Correspondence Knowledge | Nonsense Word Fluency Correct Letter Sounds(NWF-CLS) | Fluidez en los sonidos de letras (FSL) | English: Grades K–3: Identify letter-sound correspondences in the context of pseudo-words. Spanish: Grades K-1: Identify letter-sounds in isolation. 1 minute, 1:1 administration. |
Letter-Sound Knowledge (Receptive) | – | Fluidez en los sonidos de las letras K-Inicio (FSL K-Inicio) | Grade K: Identify (point to) which letter makes a certain sound. Untimed, 1:1 administration. |
Decoding | Nonsense Word Fluency Words Recoded Correctly (NWF-WRC) | Fluidez en los sonidos de las sílabas (FSL) | Grades K–3: Identify letter-sound correspondences in the context of pseudo-words. Spanish: Grades K–1: Identify letter-sounds in isolation. 1 minute, 1:1 administration. |
Word Reading | Word-Reading Fluency (WRF) | Fluidez en las palabras (FEP) | Grades K–3: Reading common words easily, quickly and correctly.1 minute, 1:1 administration. |
Fluency | Oral Reading Fluency (ORF) | Fluidez en la lectura oral (FLO) | Grades 1–6: Reading connected text with accuracy and automaticity. 1 minute, 1:1 administration. |
Reading Comprehension | Maze | ¿Cuál palabra? (CP) | Grades 2–6: Understanding meaning from texts. 3 minutes, group administration. |
Vocabulary | Vocabulary | Vocabulario | Grades K–3: Arranging letters correctly to spell words with grade appropriate features. 15 minutes, group administration. |
Encoding | Spelling | Ortografía | Grades K–3: Arranging letters correctly to spell words with grade-appropriate features. 15 minutes, group administration. |
RAN (Numbers) | Rapid Automatized Naming | – | Grades K–3: Correctly and quickly naming visual symbols, such as numbers. 1-2 minutes, 1:1 administration. |
Language Comprehension | Oral Language | Lenguaje oral | Grades K–2: Demonstrate the ability to use words and phrases acquired through conversations, reading and being read to, and responding to texts. 5 minutes, 1:1 administration. |
*Students can be assessed using off-grade measures when information on specific skills is needed.
Resources for families
Welcome California Caregivers! Please click here to learn more about mCLASS assessments.
Families play a crucial role in helping children overcome reading challenges. mCLASS DIBELS 8th Edition and mCLASS Lectura provide a Home Connect letter after each screening to explain the results in family-friendly language, recommend activities, and direct families to a free website for additional at-home support.

Developmentally appropriate
Computer-based assessments that require students to complete tasks silently or independently may over-identify students for intervention services, especially young learners who are still developing focus and attention abilities.
mCLASS requires students to actively demonstrate their proficiency in producing letter sounds, forming words, and reading texts. This approach to assessment aligns with IDA guidelines for effective screening of reading challenges. By choosing mCLASS for universal screening, you’ll gain accurate information about a student’s risk for reading difficulties, and gain the capability to monitor every student’s path to reading proficiency.
Additional resources
mCLASS Resources
- mCLASS Research Hub
- mCLASS Program Guide
- mCLASS Digital Access Guide
- mCLASS Reporting Guide
- mCLASS Help Site
- mCLASS self-guided walkthrough
Dyslexia Resources
- mCLASS Dyslexia Toolkit
- Dyslexia Fact vs. Fiction ebook
- Blog post: 4 tools to help teachers better understand dyslexia
- Science of Reading: The Podcast, Season 7, Episode 7: Debunking the “gift” of dyslexia in children, with Dr. Tim Odegard
- Science of Reading: The Podcast, Season 1, Episode 6: The facts and myths of dyslexia, with Emily Lutrick
Multilingual and English learners Resources
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