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45-45-90 Triangles icon
45-45-90 Triangles

Resource ID: TXLSR4.004
Grade Range: 10
Subject: Math

To learn the pattern of the side lengths of a 45-45-90 triangle, students complete a gallery walk, a card sort activity starting with using the Pythagorean theorem, and activity to locate if there is an error in a presented problem and if so to identify what the error is.

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6.08 Bonus Video: Law of Sines—The Ambiguous Case

Resource ID: SE1210B
Grade Range: 10 - 9
Subject: Math

The Law of Sines can be used to solve for sides and angles of oblique triangles. However, in some cases more than one triangle may satisfy the given conditions. We refer to this as an ambiguous case.

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Study Edge Precalculus

Grade Range: 10 - 9
Subject: Math

Precalculus is the preparation for calculus. The course approaches is designed to strengthen and enhance conceptual understanding and mathematical reasoning used when modeling and solving mathematical and real-world problems. Students systematically work with functions and their multiple representations. Precalculus can deepen students' mathematical understanding and fluency with algebra and trigonometry and extends their ability to make connections and apply concepts and procedures at higher levels. Students will investigate and explore mathematical ideas, develop multiple strategies for analyzing complex situations, and use technology to build understanding, make connections between representations, and provide support in solving problems (TAC §111.42(b)(3)).

This video book is brought to you by TEA and Study Edge. It may be used to teach an entire Precalculus course or to supplement traditional Precalculus textbooks.

This open-education-resource instructional material by TEA is licensed under a Creative Commons Attribution 4.0 International Public License in accordance with Chapter 31 of the Texas Education Code.

Please provide feedback on Study Edge's open-education resource instructional materials.

TEA AP® Biology
TEA AP® Biology

Subject: Science

AP® Biology covers the scope and sequence requirements of a typical two-semester biology course for AP® students. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. AP® Biology was designed to meet and exceed the requirements of the College Board’s AP® Biology Framework, while allowing significant flexibility for instructors. Each section of the book includes an introduction based on the AP® curriculum as well as rich features that engage students in scientific practice and AP® test preparation. It also highlights careers and research opportunities in the biological sciences. Content requirements for AP® Biology are prescribed in the College Board Publication Advanced Placement Course Description: Biology, published by The College Board (http://ritter.tea.state.tx.us/rules/tac/chapter112/ch112d.html#112.62).

This open-education-resource instructional material by TEA is licensed under a Creative Commons Attribution 4.0 International Public License in accordance with Chapter 31 of the Texas Education Code.

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5.01 Radians and Degree Measurements

Resource ID: SE121031
Grade Range: 10 - 9
Subject: Math

In this video, students will learn the basics of angle measurements, definitions of various types of angles, radians and degrees, along with arc length and area of a sector.

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5.02 Linear and Angular Velocity

Resource ID: SE121032
Grade Range: 10 - 9
Subject: Math

In this video, students will learn about angular and linear velocity and how each relates to unit conversions.

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5.03 Trigonometric Ratios

Resource ID: SE121033
Grade Range: 10 - 9
Subject: Math

In this video, we will define the trigonometric ratios in terms of the sides of a right triangle.

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5.04 Trigonometric Angles and the Unit Circle

Resource ID: SE121034
Grade Range: 10 - 9
Subject: Math

In this video, students will learn special angles and the unit circle, and learn how to apply them.

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5.05 Graphs of Sine and Cosine

Resource ID: SE121035
Grade Range: 10 - 9
Subject: Math

In this video, students will learn how to graph sine and cosine and how to interpret graphs of sine and cosine.

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5.06 Graphs of Secant and Cosecant

Resource ID: SE121036
Grade Range: 10 - 9
Subject: Math

In this video, students will learn how to graph and interpret graphs of secant and cosecant, and how secant and cosecant relate to sine and cosine.

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5.07 Graphs of Tangent and Cotangent

Resource ID: SE121037
Grade Range: 10 - 9
Subject: Math

In this video, students will learn how to graph and how to interpret graphs of tangent and cotangent.

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5.08 Inverse Trigonometric Functions and Graphs

Resource ID: SE121038
Grade Range: 10 - 9
Subject: Math

In this video, students will explore the relationship between trigonometric functions and their inverses.

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Drawing Conclusions about Three-Dimensional Figures from Nets

Resource ID: M7M3L16
Grade Range: 7 - 8
Subject: Math

Given a net for a three-dimensional figure, the student will make conjectures and draw conclusions about the three-dimensional figure formed by the given net.

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8.01 Conic Sections

Resource ID: SE121052
Grade Range: 10 - 9
Subject: Math

In this video, students will learn the definition of a double-napped cone, and how conic sections are formed at the intersection of a plane and a double-napped cone.

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8.02 Ellipses

Resource ID: SE121053
Grade Range: 10 - 9
Subject: Math

In this video, students will learn the analytic definition of an ellipse, the standard form of the equation of an ellipse, and how to graph ellipses.

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8.03 Hyperbolas

Resource ID: SE121054
Grade Range: 10 - 9
Subject: Math

In this video, students will learn the analytic definition of a hyperbola, the standard form of the equation of a hyperbola, and how to graph hyperbolas.

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8.05 Polar Coordinates and Equations

Resource ID: SE121056
Grade Range: 10 - 9
Subject: Math

In this video, students will learn about the polar coordinate system and how to convert to and from the rectangular coordinate system.

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8.06 Polar Graphs

Resource ID: SE121057
Grade Range: 10 - 9
Subject: Math

In this video, students will learn how to graph polar curves.

8.07 Special Polar Graphs

Resource ID: SE121058
Grade Range: 10 - 9
Subject: Math

In this video, students will learn the equations and graphs of special polar curves.

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8.04 Parametric Equations

Resource ID: SE121055
Grade Range: 10 - 9
Subject: Math

In this video, students will learn about parametric equations, how to sketch parametric curves, and the differences between parametric curves and rectangular graphs.

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