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Protecting Biodiversity loading

Diverse ecosystems are essential to a healthy planet; responsible use of resources can protect this diversity.

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Explore connections in math and science

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Discover related concepts in Math and Science.
Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
  • Real World Application
    Bringing Ancient Reptiles Back

    Bringing Ancient Reptiles Back

    by CK-12 //advanced
    Discover how the tuatara, an ancient reptile that can live up to 150 years, is being brought back from the brink of extinction.
    This indicates how strong in your memory this concept is
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