This series of video segments explains the importance of academic vocabulary in the common core curriculum. The video segments included highlight the three tiers of vocabulary [1:35], the role of vocabulary in the common core curriculum standards [2:06], and the three stages of vocabulary instruction [4:49]

Polynomial identities are equations that are true for all possible values of the variable. This introduction video gives more examples of identities and discusses how we prove an equation is an identity. [4:56]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

The zeros of a polynomial p(x) are all the x-values that make the polynomial equal to zero. They are interesting to us for many reasons, one of which is that they tell us about the x-intercepts of the polynomial's graph. We will also see that they are directly related to the factors of the polynomial. [5:08]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This teacher website provides a comprehensive lesson unit on the structure of Earth's atmosphere and how it sustains and impacts life on Earth and its ecosystems. Includes labeled diagrams, student worksheets, a slideshow, flashcards, and links to an interactive lab, videos, and resource sites.

The National Humanities Center presents collections of primary resources compatible with the Common Core State Standards - historical documents, literary texts, and works of art - thematically organized with notes and discussion questions. Topics discussed in this unit include the following: Becoming Modern: America in the 1920s: Movies. As movies came to center the mass-culture universe, two major questions came to the fore: how did movies influence modern youth, and how would the introduction of sound affect the silent film industry? Here we consider pronouncements on these two questions from a sociologist and a Hollywood producer. Also included are samples of films and cartoons, silent and with sound.

Video tutorial uses examples to provide an introduction to angles including right, acute, and obtuse angles. [8:22]

The CIA offers a collection of declassified documents that are Adobe PDF files and can be downloaded regarding the Soviet Union and from US Intelligence in the years 1989-1991. Also contains an introduction and complete overview of this period in history with a chronology.

This article explains what the different types of financial markets are, including stocks, bonds, commodities, and derivatives, as well as what the functions of financial markets are.

Learning to engage in collaborative conversations allows children to learn about their world, to become familiar with words, and to build a solid foundation for the development of reading and writing skills. This lesson will model collaborative conversations and give students a chance to practice this skill. Videos of the lesson in action and a poster for the classroom are included.

Students will explain commonalities in animal life cycles as well and to compare life cycles of different animal groups.

In this lesson, students will take a more active role in their learning by discussing a read aloud with their partners. The teacher will become more of a facilitator in the lesson and allow the children to "wrangle" with the content.

Sequencing is an important skill for kindergarten students. This lesson uses nonfiction texts to allow students to make a real-life connection to the skill of sequencing and learn about the plant cycle at the same time! Included are bulletin board ideas, links to videos, a plant cycle poster, and printable worksheets.

Interacting with polygons and testing the definitions can be engaging, fun and build a powerful, individualized understanding.

This lesson is a final step towards supporting students to practice writing an informative/explanatory paragraph conveying complex ideas and presenting information clearly and accurately. Second-grade students can usually write a paragraph with details but need the practice to weave a succinct introductory and concluding paragraph into an essay with a strong main idea and details. This lesson focuses on these crucial paragraphs and includes several videos and pictures of the lesson in action.

What are the characteristics that define populations? What causes populations to grow or decline? In the following video you will learn how a population is a group of individuals of the same species living within a designated area at one time. Three important structural aspects of a population are: dispersion pattern, population density and growth rate. [14:24]

Biology 2e is designed to cover the scope and sequence requirements of a typical two-semester biology course for science majors. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology includes rich features that engage students in scientific inquiry, highlight careers in the biological sciences, and offer everyday applications. The book also includes various types of practice and homework questions that help students understand—and apply—key concepts. The 2nd edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Art and illustrations have been substantially improved, and the textbook features additional assessments and related resources.