The CK-12 site has a wealth of great content that teachers can work into the classroom. You're likely to find a lesson that directly corresponds to what you're teaching, and the diagrams and videos are very accessible. As students dig into the content, have them track how well they're doing by looking at their quiz results over time.
Teachers can search content by CCSS, NGSS, and various state standards. If you're looking for a very specific topic, enter it in the search box to go straight there. If you don't find what you need, you can add your own content, creating Flexbooks for your students that contain the material you'd like to share. You can bookmark material that you'd like to save for later, or students can send content to a classmate via email or social media.Continue reading Show less
With CK-12, students can create an account by entering their email address and a password. They can then explore the site, which is divided into Mathematics, Science, and More. Mathematics includes subjects from arithmetic to trigonometry and statistics. Science covers all the bases: biology, chemistry, and physics, as well as life, earth, and physical science. The More section offers history, technology, and economics. Within each subject, you can click on a circle, each of which contains a number of Concepts (short, chapter-like lessons). For example, if you click on Phases of Matter, you will be given a list of topics that includes evaporation, sublimation, and solutions. Within these topics, you can choose from a series of modalities: Read, Practice, Video, Real World, and more.
Additional content includes PLIX interactives, which allow students to view or manipulate models to answer challenge questions. And the engaging physics simulations are recommended for middle and high school students. CK-12 also has dedicated iOS, Android, and Chrome apps for practice and the ability for students to create groups for sharing content with each other.
Students can learn a variety of STEM subjects through CK-12, as well as study skills and SAT prep. Some subjects, such as anatomy, require straightforward memorization, while others, like life science, will encourage students to reflect on their world and how its pieces fit together. Material on the site is well organized and very accessible. CK-12 will likely appeal most to students who are already fairly studious; it doesn't oversimplify ideas. While it does cover simpler subjects such as arithmetic, its presentation might be too advanced for students of the appropriate age and level to understand on their own. It's perfect with the help of a parent or teacher, however.
CK-12 is committed to reaching students with all types of learning needs, and the inclusion of video, audio, quizzes, and other tools may open doors for those who are having trouble in the classroom. The site is essentially transforming a textbook into a multimedia experience that is available in nearly 50 languages. Some subjects contain more content than others, but teachers are adding lessons all the time, and the site may continue to grow. Information is broken down into very specific segments, with great attention to detail. For example, students can choose between lessons on jawless fish, cartilaginous fish, or bony fish; beneath each of these topics are at least four modalities. Some of the PLIX interactives, however, lack rigor and are best suited for practice once students have learned the concept.
Key Standards Supported
Expressions And Equations
Write and evaluate numerical expressions involving whole-number exponents.
Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); build and draw shapes to possess defining attributes.
Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.
Measurement And Data
Estimate lengths using units of inches, feet, centimeters, and meters.
Number And Operations In Base Ten
Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.
Number And Operations—Fractions
Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)
Operations And Algebraic Thinking
Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
Statistics And Probability
Understand that statistics can be used to gain information about a population by examining a sample of the population; generalizations about a population from a sample are valid only if the sample is representative of that population. Understand that random sampling tends to produce representative samples and support valid inferences.
Key Standards Supported
Reading History/Social Studies
Identify key steps in a text’s description of a process related to history/social studies (e.g., how a bill becomes law, how interest rates are raised or lowered).
Integrate visual information (e.g., in charts, graphs, photographs, videos, or maps) with other information in print and digital texts.
Analyze in detail a series of events described in a text; determine whether earlier events caused later ones or simply preceded them.
Integrate quantitative or technical analysis (e.g., charts, research data) with qualitative analysis in print or digital text.
Evaluate various explanations for actions or events and determine which explanation best accords with textual evidence, acknowledging where the text leaves matters uncertain.
Integrate and evaluate multiple sources of information presented in diverse formats and media (e.g., visually, quantitatively, as well as in words) in order to address a question or solve a problem.