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CK-12 FlexBook 2.0

Ch 285.4of 28 Digital Textbook Platforms
  1. 1Runs onAndroid, iOS, Web
  2. 2CostsFree plan
2 lines stated Written from the maker's own pages: help.ck12.org
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The CK-12 FlexBook 2.0 homepage

Overview

CK-12 FlexBook 2.0 is ranked #28 of 28 in digital textbook platforms on Specifiction. It runs on Android, iOS, Web. There is a free plan.

CK-12 FlexBook 2.0 plans and pricing

All plans
FlexBook 2.0 Free Free online customizable digital textbook; content varies by subject and book help.ck12.org · 7 Oct 2026

Compared on digital textbook platforms

Free plan
Yesck12.org

Facts

Purpose
FlexBooks are customizable digital textbooks for K–12 subjects including science, math, and social studies.help.ck12.org · 7 Oct 2026
Lesson content
FlexBook 2.0 lessons combine text, PLIX interactives, simulations, adaptive practice, and related learning materials.help.ck12.org · 7 Oct 2026
Student practice
Adaptive Practice selects questions from CK-12’s library of more than 150,000 questions and adjusts them based on student answers.int-www.ck12.org · 7 Oct 2026
Teacher tools
Teachers can assign lessons, interactives, videos, and adaptive practice to a class or differentiated groups and view student progress reports.help.ck12.org · 7 Oct 2026
Customization
Educators can reorder chapters and add or edit content in a customized FlexBook.help.ck12.org · 7 Oct 2026
Integrations
CK-12 lists Google Classroom, Canvas, Schoology, Kiddom, Clever, and ClassLink as SSO or LMS partners.int-www.ck12.org · 7 Oct 2026
Offline and PDF
Users can download PDFs of FlexBooks they create or customize, but interactive content may not render and CK-12-created PDFs are not downloadable.help.ck12.org · 7 Oct 2026
Device access
CK-12 says the platform works in a browser on laptops, desktops, Chromebooks, tablets, and mobile devices; standalone Simulations and PLIX Interactives require a tablet-size screen or larger.help.ck12.org · 7 Oct 2026
Audience
FlexBooks are designed for educators and students and cover K–12 topics.help.ck12.org · 7 Oct 2026
Availability limit
CK-12 says it has converted many of its most-used books to FlexBook 2.0 and is still working to convert all core content.help.ck12.org · 7 Oct 2026
Privacy and security
CK-12 says it uses administrative, technological, and physical safeguards and encrypts information transmissions using SSL or similar technologies.help.ck12.org · 7 Oct 2026
Student data
CK-12 says it does not sell student information or use or disclose it for behavioral advertising to students.help.ck12.org · 7 Oct 2026
Support
Users can contact CK-12 Support by starting a support ticket or sending an email.help.ck12.org · 7 Oct 2026
Accessibility
FlexBook settings allow readers to adjust font size, background color, and line spacing; the accessibility statement also describes text-to-speech and Google Translate support for lesson text.help.ck12.org · 7 Oct 2026

Company

Headquarters
Menlo Park, California, United Statesck12.org · 23 Sept 2026

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All accessCh 01 VitalSource Bookshelf Free planAndroidiOS Free to start7.6 All accessCh 02 LibreTexts Free planAndroidiOS from $104.17/mo7.5 All accessCh 03 Cambridge Aspire Free trialAndroidiOS 7.4 All accessCh 04 KITABOO Free trialAndroidiOS from $1/mo7.4 All accessCh 05 Oxford Learner’s Bookshelf AndroidiOS 7.4 All accessCh 06 DIKSHA Free planAndroidiOS Free to start7.3

Where it ranks on Specifiction

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