Classroom Text Complexity Analyzer
Use the Reading Text Analyzer to estimate grade-band fit and get a clean complexity snapshot (FKGL, Reading Ease, Lexile range estimate, CEFR estimate, and classroom-friendly “other signals”).
Paste text or upload a .txt file. Runs in your browser. No accounts. No text stored.
What this tool tells you (fast)
Grade-band guidance
A teacher-facing estimate to help you judge “fit,” not a verdict.
Readability metrics
FKGL + Flesch Reading Ease for a quick baseline.
Classroom signals
Sentence spikes + additional signals to spot likely scaffolding points.
Why not rely on one score?
Most readability formulas are driven heavily by sentence length and word difficulty. In classrooms, you still need judgment—especially when background knowledge, task demands, and reading mode (read-aloud vs independent) change the difficulty.
How to use it
- Open the tool.
- Paste classroom text (or upload a .txt file).
- Click Analyze. Review the summary list first, then open Advanced Details if needed.
How to interpret the results
FKGL (Flesch–Kincaid Grade Level)
A readability estimate that roughly corresponds to a U.S. grade level. It is most sensitive to sentence length and syllables per word.
Flesch Reading Ease
A 0–100 readability scale where higher is generally easier to read. Useful as a second view alongside FKGL.
Grade band
A practical classroom suggestion. Adjust based on your students’ decoding ability, background knowledge, and whether you plan read-aloud, partner reading, or independent reading.
Sentence spikes + other signals
These help you spot “where students may stumble.” A single very long sentence in an otherwise accessible passage can change how you chunk and scaffold instruction.
FAQ
Is the text stored?
No. The tool runs locally in your browser.
What file types can I upload?
Upload supports .txt only. For Google Docs or Word, copy/paste the text into the tool.
What should I do if the grade band feels off?
Use the grade band as a starting point. Always adjust for your students, task, and reading mode.
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