With the CK-12 app for Google Home, phone and tablets, you can put your knowledge to test! CK-12 App features a voice interface to learn from 1000 questions on Biology, Earth Science, Physics & Chemistry. You can chose the subjects and challenge yourself with difficulty levels (easy, medium, hard). Whether you’re looking to improve your grades, or brush up on your favorite science subjects, CK-12 has you covered. We’re the go-to resource for K-12 STEM education.
See all of our learning resources, including free digital textbooks, at http://www.ck12.org
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CK-12 is a non-profit that creates and curates high-quality STEM content for students and teachers around the world. The organization was founded with the mission to enable everyone to learn in their own way—for free.