Differentiating reading is one of the most time-consuming parts of teaching. You find a strong article, but it is written at a ninth-grade level and you teach fifth graders. A few of your students read well below grade level, others read above it, and the rest land somewhere in between. Adapting a single passage for all of them by hand can eat an entire planning period, and that is for one text on one day.
Diffit is an AI tool built to remove that bottleneck. You give it a topic, a passage, a web article, or a YouTube link, and it returns a reading at the level you choose, along with comprehension questions, vocabulary, and ready-to-use activities. This review covers what it actually does, how it holds up in a real classroom, where it falls short, and who will get the most out of it.
What Diffit Does
At its core, Diffit takes a source and rewrites it for a target reading level. You paste an article or enter a topic, pick a grade band, and it returns an adapted passage that keeps the central ideas while adjusting sentence length, vocabulary, and structure. The same article on photosynthesis can come back as a third-grade version and an eighth-grade version, both drawn from the same source, so your whole class reads about the same content at a level each student can access.
It does more than rewrite text. Around every passage, Diffit builds a support pack: key vocabulary with student-friendly definitions, multiple-choice and open-response questions, a short summary, and prompts you can hand straight to students for writing or discussion. You can start from four kinds of input: a topic you type in, a block of text you paste, a web URL, or a YouTube video. A current-events article, a science explainer, or a video you already planned to show can each become a leveled reading set in a couple of minutes.
The output is also easy to get into students’ hands. Diffit lets you export to a Google Doc, push materials to Google Classroom, or print a clean worksheet, so the passage and its questions move from screen to lesson without extra formatting. You can edit anything it produces before exporting, which matters when you want to reword a question or trim a definition to match how your class talks about a concept.
How It Holds Up in the Classroom
The real test is whether the output is usable without hours of cleanup. In practice, it mostly is. Feeding in a grade-eight science article and asking for a fifth-grade version produced a readable passage in under a minute. The adaptation held onto the main concepts, shortened the dense sentences, and swapped the hardest vocabulary for accessible terms while flagging the words worth teaching. Students who normally stall on a wall of text were able to get through it and answer questions about it.
Picture a single lesson built on a current-events article about renewable energy. From one source you generate a third-grade version for two students on IEPs, a fifth-grade version for the bulk of the class, and a seventh-grade version for the readers who need a challenge. Every student discusses the same topic, uses the same vocabulary, and answers questions built from the same passage, so the class stays together even though the text meets each reader where they are. Building that by hand could take most of a prep period. With Diffit it takes a few minutes, and the shared vocabulary keeps the whole-group discussion coherent.
The generated questions are a genuine time-saver, though they are a starting point rather than a finished product. The multiple-choice items are solid for checking basic comprehension. The open-response prompts are reasonable, but the strongest ones still come from a teacher who knows what the lesson is for. The honest workflow is to generate the set, then spend five minutes trimming and sharpening rather than thirty minutes building from scratch.
Strengths and Limits
The strengths are real. Diffit is fast, it produces several reading levels from one source, and the support materials around each passage save meaningful prep time. The free tier is generous enough to cover a single classroom comfortably, which lowers the barrier to trying it.
The limits are worth naming too. The level adaptations occasionally oversimplify, smoothing out nuance that a stronger reader should wrestle with, so the highest grade bands need a teacher’s eye. The questions can skew toward surface recall. And like any AI tool, it can introduce a small error or an awkward phrasing, which means a quick read-through before you hand anything to students is not optional. None of this makes it less useful. It means Diffit is a drafting partner, not an autopilot.
| Category | Rating | Notes |
|---|---|---|
| Ease of use | 5/5 | Paste, pick a level, done |
| Output quality | 4/5 | Strong adaptations, occasional oversimplification |
| Free tier value | 4/5 | Enough for one classroom |
| Time saved | 5/5 | Minutes instead of a planning period |
Pricing and Who It Is For
On cost, the free plan covers the essentials: generating leveled readings, questions, and vocabulary for everyday use. Diffit also offers a paid tier with extras such as additional activity types, more export options, and saved materials, which is worth considering only once the free version has proven itself in your routine. For most teachers, the free plan handles a regular differentiation workload on its own.
Diffit earns its place for any teacher who differentiates reading regularly. Mixed-level classes, English language learners, and special education settings benefit the most, because getting the same content into every student’s hands at the right level is a daily reality in those rooms. If you rarely adapt text, you may not need it. If you do it every week, it can give you back real planning time. To start, create a free account at diffit.me, paste an article or enter a topic, and generate your first leveled set. Treat the first output as a draft, give it a quick edit, and you will know within one lesson whether it fits how you teach.
Related reading: explore more practical tool reviews and classroom strategies across EdTech Institute.
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