Lexile or CEFR? Reading levels when your class is both
One system came from measuring texts, the other from describing learners. Schools teaching English to non-native speakers end up needing both, and nobody explains how they fit together.
9 min readA Lexile measure describes a text — how hard the sentences and vocabulary are. A CEFR level describes a person — what they can do in the language. They are not two versions of the same scale, and converting between them is an approximation, not a lookup. Use Lexile to choose material, CEFR to describe the learner.
They measure different objects
This is the whole confusion in one sentence: one measures the page, the other measures the reader.
- Derived from sentence length and word frequency
- Produces a number, so texts can be ordered precisely
- Says nothing about whether the reader will understand the ideas
- Built in a first-language reading context
- Describes what someone can do across reading, writing, listening, speaking
- Produces a band, not a number
- Covers language ability generally, not one text
- Built for second-language learning
A text can carry a Lexile measure without any learner involved. A student has a CEFR level regardless of what they are reading. Neither statement makes sense the other way round.
Why English departments end up with both
Because the two worlds supply different things. Reading material — graded readers, levelled libraries, most reading platforms — is largely labelled with reading measures inherited from first-language literacy. Meanwhile your curriculum, your exams and your reports are described in CEFR.
So a head of department ends up holding a text labelled one way and a cohort described the other, with no reliable bridge between them.
| You need to… | Use | Because |
|---|---|---|
| Pick a text for a group | A reading measure | It ranks texts by difficulty, which is the question you're asking |
| Report progress to leadership | CEFR | It's the language your curriculum and exams already use |
| Place a new student | CEFR | You're describing the person, not a page |
| Explain to a parent | CEFR | "Working at B1" travels; a numeric measure doesn't |
Where conversion breaks down
Published conversion tables exist and they are useful as a rough guide. They are not equivalences, and treating them as such causes two specific problems.
- Difficulty measures ignore background knowledge. A text about cricket and a text about volcanoes can score identically and be wildly different for a given student. For English learners, cultural familiarity often matters more than sentence length.
- CEFR bands are wide. B1 covers a lot of ground. Two students both described as B1 can need noticeably different texts, and no conversion table will tell you that.
How Dily handles it
Dily uses ten internal levels, mapped across the CEFR range from A1 to C2. Ten is deliberately more granular than six CEFR bands, because a band is too wide to choose a text with — but each level maps to a band, so what you report to leadership stays in the vocabulary your school already uses.
In practice that means you pick material by level and describe students by band, without maintaining two separate systems in a spreadsheet.
Bring Dily to your classrooms
Tell us about your school and we'll set up a demo tailored to how your teachers work. Pilot programs available.