Differentiating reading materials is one of the most time-consuming parts of teaching. You find a great article, but it’s written at 9th-grade level and you teach 5th graders. Or you have readers spanning four grade levels in one class.
Diffit solves this. Paste any text, and it adapts the reading level instantly. Here’s what you need to know.
## Quick Verdict
| Category | Rating | Notes |
|———-|——–|——-|
| Ease of Use | 5/5 | Paste text, select level, done |
| Output Quality | 4/5 | Strong adaptations, occasional oversimplification |
| Free Tier Value | 4/5 | Enough for one class, limits hit with multiple preps |
| Time Savings | 5/5 | What took 30+ minutes now takes 2 |
**Bottom line:** Diffit is the best single-purpose AI tool for differentiation. If adapting texts is a regular part of your workflow, this is essential.
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## What Diffit Does
Diffit takes any text and adapts it to different reading levels while preserving the core content. You get:
– **Adapted text** at your chosen grade level
– **Key vocabulary** pulled from the passage
– **Comprehension questions** auto-generated
– **Summary** of main ideas
The process: paste your text (or enter a URL), select target grade level, click generate. Output appears in about 10 seconds.
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## What I Tested
I ran three different text types through Diffit to see how it handles real classroom needs:
### Test 1: News Article Adaptation
**Original:** A New York Times article about climate policy (written at ~11th grade level)
**Target:** 6th grade
**Result:** Diffit shortened sentences, replaced advanced vocabulary (“unprecedented” became “never seen before”), and broke complex paragraphs into simpler chunks. The core argument remained intact.
**What needed editing:** One metaphor got lost in translation. I added it back manually.
**Time:** 90 seconds total, including my edit.
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### Test 2: Textbook Passage
**Original:** An 8th-grade science textbook section on cellular respiration
**Target:** 5th grade (for my below-level readers) and 8th grade (original)
**Result:** The 5th-grade version simplified the process explanation without losing accuracy. Key terms like “mitochondria” and “ATP” were kept but explained in simpler context.
**What needed editing:** The 5th-grade version was slightly too short. I added one sentence back for completeness.
**Time:** 2 minutes for both versions.
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### Test 3: Primary Source Document
**Original:** Excerpt from the Declaration of Independence
**Target:** 4th grade
**Result:** This was the hardest test. Diffit produced a readable version that captured the main ideas (“The colonists were saying they had the right to be free”), but some nuance was necessarily lost.
**What needed editing:** I used this as a companion to the original, not a replacement. For primary sources, students still need exposure to the actual language.
**Time:** 1 minute.
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## Free vs. Paid
| Feature | Free | Pro |
|———|——|—–|
| Texts per day | ~5-10 | Unlimited |
| Reading levels | All | All |
| Vocabulary lists | Yes | Yes |
| Comprehension questions | Yes | Yes |
| Class management | No | Yes |
| Assignment tracking | No | Yes |
**Is Pro worth it?**
For a single-subject teacher with one prep, free is usually enough. You’ll hit limits if you:
– Teach multiple subjects or grade levels
– Need to differentiate for 5+ distinct reading levels
– Want to save and organize adapted texts
Pro pricing varies, check their site for current rates.
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## Compared to Other Tools
**Diffit vs. MagicSchool’s Text Leveler:**
– Diffit is faster and more focused
– MagicSchool offers more tools but text leveling is just one feature
– For pure differentiation, Diffit wins
**Diffit vs. Doing It Yourself:**
– Manual adaptation: 20-40 minutes per text
– Diffit: 1-2 minutes per text
– No comparison
**Diffit vs. ChatGPT:**
– ChatGPT can adapt text but requires more prompting
– Diffit is purpose-built and faster
– ChatGPT is more flexible but less efficient for this task
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## Best Use Cases
**Science and social studies teachers:** These subjects often have texts written above grade level. Diffit makes content accessible without dumbing it down.
**ELL teachers:** Create multiple versions of the same content for different language proficiency levels.
**Inclusion classrooms:** Same lesson, different reading levels. Students don’t feel singled out because everyone has “their version.”
**Test prep:** Adapt practice passages to build toward grade-level complexity.
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## Limitations
**Nuance loss in heavy simplification:** Dropping 5+ grade levels inevitably loses some complexity. Use heavily adapted texts as scaffolds, not as replacements.
**Formatting quirks:** Bullet points and tables sometimes don’t survive adaptation cleanly. Check formatting before printing.
**No image handling:** Diffit works with text only. Diagrams and images need separate attention.
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## Classroom Example
A 7th-grade history teacher is teaching a unit on the Industrial Revolution. She finds a great primary source, a factory worker’s account from 1832, but it’s written at a 12th-grade level.
**Without Diffit:**
– Spend 30 minutes rewriting the text
– Or skip the source entirely
– Or watch students struggle through it
**With Diffit:**
– Paste the source into Diffit (30 seconds)
– Generate a 7th-grade version (10 seconds)
– Generate a 5th-grade version for her lowest readers (10 seconds)
– Review and print (2 minutes)
**Total time:** Under 3 minutes for two differentiated versions.
She prints both versions, distributes by reading level, and teaches the same content to everyone. Discussion is richer because everyone could actually read their text.
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## Your Next Step
Go to [Diffit](https://diffit.me) and paste a text you’ve been meaning to adapt. See the output in 10 seconds.
If you differentiate reading materials regularly, this tool pays for itself in time saved within the first week.
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*What texts have you struggled to adapt? Drop a comment and I’ll suggest the best approach.*