CK-12 FlexBook 2.0 vs Imagine Learning

CK-12 FlexBook 2.0 provides customizable digital textbooks for K–12 subjects including science, math, and social studies. Lessons can combine text with PLIX interactives, simulations, adaptive practice, and related learning materials. Adaptive Practice draws questions from a library of more than 150,000 and adjusts selections based on student answers. Teachers can assign lessons, videos, interactives, and practice to whole classes or differentiated groups, then view progress reports. Educators can reorder chapters and edit or add content in customized FlexBooks. The service works in browsers on laptops, desktops, Chromebooks, tablets, and mobile devices, and is listed at free. Standalone Simulations and PLIX Interactives require a tablet-size screen or larger. Users may download PDFs of FlexBooks they create or customize, though interactive content may not render; CK-12-created PDFs are not downloadable. CK-12 says it is still converting all core content to FlexBook 2.0. Listed SSO or LMS partners include Google Classroom, Canvas, Schoology, Kiddom, Clever, and ClassLink.

Imagine Learning provides K–12 curricula, supplemental and intervention programs, assessment, courseware, professional learning, and instructional services. Its offerings span multiple subjects and grade levels, with standards alignment, teacher tools, built-in assessments, LMS integration, and offline access listed. Imagine Language & Literacy offers personalized instruction and practice in literacy and English language development for PreK–6 learners. Imagine Math provides adaptive, age-appropriate pathways and supplemental mathematics instruction from PreK through Geometry. Imagine ClassMate supports lesson planning, resource discovery, practice creation, and drafting communications in Imagine IM and Imagine EdgeEX. Products support several single sign-on options, including Active Directory/ADFS, LDAP, SAML, LTI, Google, or Clever; SSO must be paired with a nightly account import. StudySync, Traverse, and Dragonfly can provide assignment deep links and pass grades to Canvas, Schoology, and Google Classroom. The company says it works with teachers, administrators, and parents to support more than 18 million students. School and district pricing is available on request. Platforms listed are Android, iOS, macOS, web, and Windows.