ReadWorks vs Conker: Which Is Better for Teachers?
ReadWorks is a free nonprofit library of 7,000+ leveled nonfiction passages with ready-made comprehension questions; Conker is a free AI tool that generates a custom quiz from any text, topic, or webpage you feed it in seconds. If you need a trusted, pre-built passage matched to a Lexile level, ReadWorks wins. If you need a quiz built fast around your own material — a novel chapter, a class discussion topic, a current event — Conker wins.
Quick Answer: Choose ReadWorks when you want a curated, already-leveled nonfiction passage with vetted comprehension questions attached. Choose Conker when you already have text or a topic in mind and need an assessment generated from it quickly. Many reading and ELA teachers use both — ReadWorks for the content library, Conker for everything the library doesn't cover.
Reading comprehension tools are among the most crowded corners of edtech, and ReadWorks and Conker get compared because they both show up on "free tools for reading teachers" lists. But they solve different halves of the same problem. ReadWorks answers "where do I find a good passage?" Conker answers "how do I turn what I already have into a quiz?"
Say you teach Grade 4 ELA and you're building a unit on the water cycle that ties into your science block. You might pull a Lexile-matched nonfiction passage on the topic straight from ReadWorks's library, then later use Conker to turn a shorter current-events article you found yourself into a five-question comprehension check. That pairing — library first, generator second — is the fastest way to see how the two tools actually fit together.
What ReadWorks and Conker Are Actually Built For
ReadWorks is a content library first and a question-generation tool second. It provides 7,000+ nonfiction passages, organized by grade level (K-12), topic, and Lexile band, each already paired with teacher-ready comprehension questions and vocabulary support. Its AI component is mostly a reading-level adaptation layer — filtering and matching passages to a Lexile score, not generating original content from scratch.
Conker is a generation tool first and has no content library of its own. You give it a topic, a block of pasted text, or a webpage link, choose your question types, and it drafts a quiz in seconds — ready to edit, export, or assign. It has no pre-built passages; every quiz starts from material you supply.
| Dimension | ReadWorks | Conker |
|---|---|---|
| What it is | Free nonprofit library of leveled nonfiction passages | Free AI-powered quiz and assessment generator |
| Content source | ReadWorks's own curated 7,000+ passage library | Any text, topic, or webpage the teacher provides |
| Core output | Passage + comprehension questions + vocabulary | Custom quiz, exit ticket, or reading-response set |
| Grade range | K-12, Lexile-banded | Strongest in K-9 |
| Built by | Nonprofit organization | AI-focused edtech company |
| Best at | Finding a trusted, already-leveled passage fast | Turning your own material into an assessment fast |
| Cost | Completely free | Free, with usage limits on heavier tiers |
What ReadWorks Does Well
ReadWorks's entire value proposition is trust and depth in one place: a large, vetted, already-leveled library that doesn't require a teacher to source or write anything from scratch.
A large, Lexile-organized nonfiction library
ReadWorks's library skews toward science and social studies informational text, the category most underrepresented in typical ELA curricula. A Grade 5 class studying ecosystems can all read different Lexile versions of the same ecosystem passage, then discuss as a group from shared content knowledge despite reading at different text-complexity levels.
- Differentiation built in: the same topic is available at multiple Lexile bands, so a mixed-ability class can read the same subject at different levels.
- Content-area strength: science and social studies passages fill a gap most reading programs leave thin.
- Ready-made questions: every passage arrives with comprehension questions already attached, no drafting required.
Word Up: embedded vocabulary instruction
ReadWorks's Word Up program teaches vocabulary in context rather than through isolated word lists, having students encounter target words inside real passages before working on them directly in follow-up activities. For a teacher trying to build vocabulary instruction into reading time rather than as a separate lesson, that embedding is the practical advantage.
A digital assignment system built for classroom management
ReadWorks also handles the logistics of assigning and collecting reading work, not just supplying the passage itself. Teachers can assign a specific passage or Lexile level to individual students or the whole class through its digital system, then review responses without printing anything. For a teacher managing 25-30 students across several reading levels, that built-in assignment layer removes a real organizational headache.
- Individualized assignment: different students can receive different Lexile versions of the same passage automatically.
- Response collection: student answers come back into one dashboard rather than a stack of papers.
- No extra tool needed: the assignment system is part of the free platform, not a separate paid add-on.
Where ReadWorks falls short
ReadWorks has no way to generate a quiz from material outside its library. If a teacher wants to build a comprehension check around a class novel, a current-events article, or a webpage they found themselves, ReadWorks's curated-passage model doesn't reach that need — the content has to already exist inside its library.
What Conker Does Well
Conker's entire value proposition is speed and flexibility: any text becomes a quiz in seconds, with no library to search through first.
Turning any text or topic into an assessment fast
Give Conker a topic, a pasted passage, or a webpage link, choose your question types, and it drafts a ready-to-use quiz in seconds — multiple choice, short answer, or reading-response sets, depending on what you need. That speed is the entire appeal for a teacher who needs a comprehension check for material ReadWorks doesn't already have.
- Works from your own material: a novel excerpt, a class handout, a news article — anything you can paste or link.
- Fast turnaround: seconds from prompt to draft, versus searching a library for the closest match.
- Editable output: you review and adjust before assigning, not a locked, final product.
A genuine formative-assessment specialist
Conker is designed for the everyday classroom rhythm of exit tickets, do-nows, and unit quizzes — the low-stakes, frequent checks that eat prep time in small increments across a week. Its design philosophy leans on speed with a human still reviewing before anything reaches students, matching guidance from the U.S. Department of Education's Office of Educational Technology (2023) on keeping a teacher's judgment between AI output and students.
Question-type variety and export options
Conker isn't limited to a single question format — teachers can typically choose from multiple-choice, short-answer, and reading-response styles depending on what the check needs to measure. Many generated quizzes can also be exported into formats teachers already use for delivery, such as Google Forms, reducing the friction between generating a quiz and actually assigning it.
- Format flexibility: switching question types takes a setting change, not a rebuild from scratch.
- Export-friendly: generated quizzes move into existing classroom workflows rather than staying locked in Conker's own interface.
- Fast iteration: if the first draft misses the mark, regenerating from the same source text takes seconds.
Where Conker falls short
Conker has no curated content library of its own and leans toward objective question types. If a teacher doesn't already have a text or topic in mind, Conker has nothing to offer until they supply one — and it's weaker for rich, open-ended assessment design than for straightforward comprehension checks.
Privacy and Data Considerations
Both tools involve student work or student-identifiable information at some point, which puts them in FERPA and COPPA territory even though neither markets itself primarily to children under 13. FERPA (1974) governs education records maintained by schools; COPPA (1998) governs data collected directly from children under 13.
Three questions worth asking before rolling either tool out broadly:
- Does ReadWorks's digital assignment system store identifiable student response data, and does your district's existing data agreement already cover that use?
- What does Conker's privacy policy say about text you paste in — particularly if that text includes student names or other identifying details from your own classroom materials?
- Has either tool already been vetted by your district's technology office, or would using it be a personal choice made outside that review?
CoSN's (2024) reporting has repeatedly ranked student-data privacy among K-12 technology leaders' top concerns — worth the extra few minutes of checking before either tool touches a full class roster. For the fuller vetting framework, see Is ChatGPT FERPA Compliant? What Schools Need to Know.
Head-to-Head on Specific Reading Tasks
Lining the two tools up against concrete classroom moments shows why this resolves by task, not by an overall winner.
| Task | Better fit | Why |
|---|---|---|
| Finding a Lexile-matched nonfiction passage fast | ReadWorks | Large, pre-leveled library already exists |
| Quizzing students on a class novel chapter | Conker | Generates from text you supply; ReadWorks won't have your exact novel |
| Building a science-content reading lesson | ReadWorks | Library skews toward science and social studies |
| Turning today's news article into a comprehension check | Conker | Works from any pasted text or link |
| Embedded vocabulary instruction | ReadWorks | Word Up program built into the platform |
| A quick exit ticket on whatever you just taught | Conker | Fastest path from topic to finished quiz |
| Differentiating the same topic across reading levels | ReadWorks | Multiple Lexile versions of the same passage |
| Assessing a webpage or handout with no existing questions | Conker | Generates questions from any source you link or paste |
Grade Bands and Subjects: Does Either Tool Fit Better?
Both tools span a wide K-12 or K-9 range, but their natural center of gravity differs slightly. ReadWorks explicitly organizes by grade and Lexile band across K-12, making it a strong fit at every level, including high school. Conker's design and use cases concentrate more heavily in elementary and middle school, where quizzes and reading checks are a universal, everyday need.
- Grades K-5: ReadWorks's leveled library is especially strong here, with content-area passages that fill gaps in early elementary ELA. Conker fits naturally for quick formative checks alongside it.
- Grades 6-9: Both tools work well — ReadWorks for finding new passages on a topic, Conker for quizzing whatever the class is currently reading, including material ReadWorks doesn't carry.
- Grades 10-12: ReadWorks's library extends into high school; Conker still helps for quick formative quizzes but sees less emphasis here than at younger grades.
Reading and ELA teachers specifically
For a dedicated reading or ELA teacher, the two tools rarely compete for the same task. ReadWorks is the go-to when the goal is finding new content matched to a specific reading level. Conker is the go-to when the content already exists — a class text, a shared article — and the missing piece is just the questions.
Cost and Access
Both tools are free, but their funding models explain why.
- ReadWorks is completely free, operating as a nonprofit that provides its full library and question sets without charge — there is no paid tier to upgrade into.
- Conker offers a free tier covering core quiz generation, with usage limits at higher volume for teachers or schools that need heavier use.
- EduGenius, for generating finished, exportable classroom materials beyond quizzes — worksheets, flashcards, presentation slides — runs on a credit system: new users start with 25 welcome credits, with paid plans at $7.99/month (500 credits, Starter) or $15.99/month (1,000 credits, Professional).
Why this matters for budget-conscious reading teachers
Neither ReadWorks nor Conker requires a purchase order to try, which matters given how tight classroom technology budgets tend to be. A Project Tomorrow Speak Up (2024) finding that budget remains among the top barriers to adopting classroom technology is exactly why a genuinely free, no-catch tool like ReadWorks stands out in a crowded reading-tools market.
Using Both Together in the Same Unit
A reading teacher doesn't have to choose one tool for the whole year — ReadWorks and Conker slot into different steps of the same unit without overlapping.
- Start with ReadWorks to find a Lexile-matched nonfiction passage on your unit's topic, using its built-in comprehension questions as your baseline assessment.
- Supplement with your own material — a current-events article, a class novel excerpt, a video transcript — that ReadWorks's library doesn't already cover.
- Use Conker to generate a quiz or exit ticket from that supplemental material, matching the question style to what you already used from ReadWorks.
- Mix Lexile-differentiated ReadWorks passages with Conker-generated checks across a unit, so every student reads at their level while every check stays consistent in format.
EduGenius fits a related but separate gap: producing finished, printable materials — worksheets, flashcards, presentation slides, and long-format assessments — that neither ReadWorks nor Conker is built to generate. A teacher could use EduGenius to build a differentiated worksheet from that same water-cycle unit, exported as a PDF or DOCX, while ReadWorks supplies the reading passage and Conker handles the quick comprehension check.
For a related comparison in the same pillar, see SchoolAI vs Curipod: Which Is Better for Teachers?
Pro Tips for Getting the Most from Either Tool
A few habits make both tools meaningfully more useful than treating them as one-click solutions.
- Search ReadWorks before writing your own passage. With 7,000+ options, there's a strong chance a Lexile-matched passage on your topic already exists.
- Always review a Conker-generated quiz before assigning it. The draft is a strong starting point, not a finished, vetted assessment — check that questions match your actual lesson goal.
- Pair a ReadWorks passage with a Conker-generated discussion prompt when you want comprehension questions plus something more open-ended than the library provides.
- Use ReadWorks's Lexile filtering deliberately, not just by grade level — a mixed-ability class benefits more from matching individual students to their actual reading level.
What to Avoid
Most frustration with either tool traces back to one of these habits.
- Assuming Conker has a content library like ReadWorks. It generates from what you provide — it has no passages of its own to search.
- Skipping ReadWorks's search step and writing a passage from scratch. With thousands of existing options, that's often unnecessary work.
- Assigning an unreviewed Conker quiz. Objective-question generators occasionally misjudge nuance in a topic — a quick read-through before assigning catches most issues.
- Ignoring Lexile mismatches. Assigning a passage above a student's reading level defeats ReadWorks's core differentiation advantage.
Key Takeaways
- ReadWorks and Conker solve different halves of the reading-assessment problem — a curated content library versus a generator for material you already have.
- ReadWorks offers 7,000+ free, Lexile-leveled nonfiction passages with built-in comprehension questions and vocabulary support.
- Conker generates a custom quiz from any topic, text, or webpage in seconds, strongest for formative checks in Grades K-9.
- ReadWorks is completely free as a nonprofit; Conker's free tier covers core use, with limits at higher volume.
- Both tools skew toward objective, comprehension-style questions rather than deep, open-ended assessment design.
- Many reading teachers use both — ReadWorks for the passage library, Conker for everything the library doesn't already carry.
- Neither tool generates finished, printable classroom materials beyond quizzes and passages — that's a separate gap a tool like EduGenius is built to fill.
Frequently Asked Questions
Is ReadWorks or Conker better for teachers?
It depends on what you need. ReadWorks is better when you want a trusted, already-leveled nonfiction passage with comprehension questions attached. Conker is better when you already have text or a topic and need a quiz generated from it fast. Many reading teachers use both for different parts of a unit.
Does ReadWorks use AI to generate its content?
Not primarily — ReadWorks's core library is a curated collection of 7,000+ nonfiction passages, and its main AI-driven feature is reading-level adaptation, matching or filtering passages by Lexile band. Original question and passage generation is a smaller part of what the platform does compared to its library.
Can Conker create a quiz from a novel my class is reading?
Yes. Conker generates questions from text you paste or a webpage you link, which makes it a good fit for a specific novel chapter or excerpt that a pre-built library like ReadWorks wouldn't have in its own collection.
Is ReadWorks completely free, or does it have paid tiers?
ReadWorks is completely free. It operates as a nonprofit and provides its full passage library, comprehension questions, and vocabulary program without charge — there is no paid upgrade tier to unlock additional content.
Which tool is better for a mixed-ability reading class?
ReadWorks generally has the edge for mixed-ability groups, since its Lexile-banded library lets every student read the same topic at their own level with minimal extra work from the teacher. Conker can still help by generating a comprehension check pitched at a specific reading level from a text you provide, but matching that level is on the teacher rather than built into the platform automatically.