CK-12 is not available for iPad but there are a few alternatives with similar functionality. The best iPad alternative is Khan Academy, which is free. If that doesn't work for you, our users have ranked more than 10 alternatives to CK-12, but unfortunately only two of them are available for iPad. If you can't find an alternative you can try to remove all filters.
Khan Academy is not-for-profit with the goal of changing education for the better by providing a free world-class education to anyone anywhere.
Eureka.in NSES app is specially designed for student and teachers dedicatedly aligned with the National Science Education Standard for USA.
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