CK-12 FlexBook 2.0 vs Siyavula

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.

Siyavula is a web-based learning platform for Mathematics and Physical Sciences practice, educator tools, and free textbooks. Learners can work through unlimited question versions, receive instant marking and full solutions, and follow their progress on a personal dashboard. Questions become harder as learners master concepts. Practice covers Mathematics in Grades 8–12 and Physical Sciences in Grades 10–12, aligned with South Africa’s CAPS curriculum, and works on any internet-enabled device. Educators can search questions by subject, grade, topic, and difficulty, then assign automatically marked homework and assessments. Reports let teachers review activity and progress at individual, class, and school levels. Textbooks for several subjects across Grades 4–12 are free to read and download; users may copy, share, or modify them. Siyavula says the site is zero-rated on MTN and Cell C networks in South Africa. Learner access and verified-teacher access are free. Essentials costs $2,050 a year per teacher and subject, excluding VAT; Advanced costs $6,199 a year per teacher and subject, excluding VAT.