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ReadTheory

Adaptive reading comprehension practice for K-12, ESL and special education classes, with progress reports.

ReadTheory is an adaptive reading comprehension programme for schools. ReadTheory places each student with a short benchmark assessment, then serves passages and quizzes at a matching level and reports growth by Lexile, grade and ELA standards. Teachers set up classes online, and a free Basic plan covers one teacher with 30 students.

Best for Teachers and school leaders who want levelled reading practice with built-in benchmark assessments and reporting.

ReadTheory website home page
Screenshot of readtheory.org, captured 9 Oct 2026
Platforms
Web
Pricing model
Freemium
Free plan
Yes
Made by
ReadTheory
Added

Last verified: . Information taken from readtheory.org.

What is ReadTheory?

ReadTheory is an online reading comprehension programme for schools. Each student begins with an adaptive benchmark assessment, which the site says takes about 14 minutes, and the level of later passages keeps adjusting to their answers. Students get feedback after every question and can follow their own progress and goals on a personal dashboard. The reading material comes from a library of fiction and nonfiction texts aligned to standards and written by the company's own authors; teachers can also generate a custom passage on a topic of their choice, and an AI worksheet builder is listed among the resources. Reports show Lexile level, grade level and ELA standards for a student, class, school or district. Passages and quizzes can be printed. A free Basic plan covers one teacher and 30 students.

Key Features

Adaptive Benchmark

Places each student at a reading level with a short assessment and keeps adjusting difficulty afterwards.

Text Library

Supplies thousands of standards-aligned fiction and nonfiction passages with quizzes.

Custom Content

Generates a new passage on a topic the teacher chooses when the library has no match.

Progress Reports

Reports growth by Lexile level, grade level and ELA curriculum standards, from one student up to a district.

Printable Materials

Provides passages, quizzes, graphic organisers and worksheets in print form for offline lessons.

School Integrations

Connects through LMS, LTI and rostering links, with single sign-on via Clever, Google Classroom and ClassLink.

How ReadTheory works

  1. Set up a class

    A teacher creates classes through the onboarding flow, which the site says takes under five minutes.

  2. Run the benchmark

    Students take the adaptive assessment, which can happen on the same day.

  3. Practise at level

    Each student receives passages and quizzes matched to the level found, with feedback after every answer.

  4. Review the reports

    Teachers and administrators check growth, mastery and gaps in the reporting views.

Use Cases

Daily Reading Practice
Give every student passages at their own level during class time.
Beginning, Middle and End-of-Year Benchmarks
Measure reading levels at set points using the built-in assessments.
ESL and Special Education
Support learners who need material below or apart from grade level.
Substitute or Small-Group Days
Print passages and worksheets when screens are not practical.
District Reporting
Review reading growth across schools from one report.

Things to know

Free plan limits
Basic covers one staff member and 30 students, with a limited number of quizzes per week and limited progress history.
School Champion is per classroom
The paid single-teacher plan covers one staff member and starts at 40 students.
District pricing is quoted
School & District plans are priced per student from enrolment numbers supplied to the sales team.

FAQs

What is ReadTheory?

ReadTheory is an online reading comprehension programme with adaptive quizzes and progress tracking for grades K-12, ESL, special education and adult learners.

Is ReadTheory free?

Yes, ReadTheory has a free Basic plan. The company says it needs no credit card, shows no ads and does not expire; it covers one staff member and 30 students with limited weekly quizzes.

How much does ReadTheory cost?

ReadTheory offers a free Basic plan, a paid School Champion plan for a single classroom and custom-quoted School & District plans priced per student. See the official pricing page for current figures.

Does ReadTheory use AI?

ReadTheory lets teachers generate custom reading passages on any topic and lists an AI Worksheet Builder among its resources; its main library is written by human authors.

What reports does ReadTheory provide?

ReadTheory reports Lexile level, grade level and ELA standards mastery, and shows trends for a class, a school or a whole district.

Is ReadTheory compliant with student privacy rules?

ReadTheory states that it is FERPA compliant and that student data is protected.

Can I upgrade from the free ReadTheory plan later?

Yes. ReadTheory says moving from Basic to a paid plan takes minutes and keeps existing student progress, reading levels and history.

Who it's for

  • Teachers
  • Schools and districts
  • Parents
  • ESL instructors
  • Special education staff

Tagsreading comprehensionadaptive quizzesK-12ESLLexile reports

Used in these workflows

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