Activity
Texas Instruments

Texas Instruments: Going in Circles Inscribed Angles

For Teachers 9th - 10th Standards
This lesson has students discover properties of inscribed angles in a circle. Students use the Geometer's Sketchpad application for the TI-89 to construct a circle and an inscribed angle.
Lesson Plan
Texas Instruments

Texas Instruments: Relationship of Angles to the Circle

For Teachers 9th - 10th Standards
In this activity, students recognize the relationship of angles to circles. They study the Inscribed Angle Theorem and its corollaries.
Unknown Type
Mr. Martini's Classroom

Mr. Martini's Classroom: Circles Geometry Review

For Students 3rd - 8th Standards
This resource provides two levels of multiple choice questions to review the parts of a circle as well as area and perimeter.
Handout
Ohio State University

Huron's Review of C. Krumhansl's Cognitive Foundations

For Students 9th - 10th
This book review clearly states in the first paragraph what is not included as part of the text. The book centers its content around the "perception of key." The author is known for her "probe-tone" method, which is defined. For a book...
Handout
Exploratorium

Exploratorium: Vocales Vocalizadas

For Students 9th - 10th
Explanations, with audio examples, of the way your vocal tract changes when different vowel sounds are made.
Interactive
PurposeGames

Purpose Games: The Vocal Tract

For Students 9th - 10th
Players will test their knowledge of the vocal tract by taking this 17 question quiz.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Circumference

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] In this lesson students calculate a circle's circumference. Students examine guided notes, review guided practice, watch instructional videos and attempt practice...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Parts of Circles

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Name the parts of a circle.
Handout
OpenStax

Open Stax: Catherine Schmidt Jones: Pitch Sharp, Flat and Natural Notes

For Students 9th - 10th
Learn about the meanings and uses of pitch and accidentals. Including sharp, flat, natural and double sharps and flats, this lesson explains why they are necessary.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Inscribed Angles in Circles

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept teaches students properties of inscribed angles and how to apply them.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Parts of Circles

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students the vocabulary for the parts of circles, including lines passing through circles.
Activity
CK-12 Foundation

Ck 12: Area of Sectors and Segments: Pacman Area

For Students 9th - 10th
[Free Registration/Login Required] Students are to determine the area of the shaded region between two radii. Click challenge me to answer practice questions and click learn more to watch a video.
Unit Plan
Texas Education Agency

Texas Gateway: Making Conjectures About Circles and Segments

For Students 9th - 10th
Given examples of circles and the lines that intersect them, the student will use explorations and concrete models to formulate and test conjectures about the properties and relationships among the resulting segments.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G C, G Co Tangent Lines and the Radius of a Circle

For Teachers 9th - 10th Standards
In this task, students are shown a circle with center O and point P on the circle. L is a line that is a tangent to the circle at P. They must show that line OP is perpendicular to line L. Aligns with G-C.A.2, G-CO.A, and G-CO.C.9.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G C, G Srt Neglecting the Curvature of the Earth

For Teachers 9th - 10th Standards
Jerry and Ashley are trying to find out if it is possible to see the lowest point in the USA from the highest point in the USA. It turns out that the highest point in the United States, the peak of Mount Whitney, is only 85 miles from...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G C Right Triangles Inscribed in Circles I

For Teachers 9th - 10th Standards
This task provides a good opportunity to use isosceles triangles and their properties to show an interesting and important result about triangles inscribed in a circle with one side of the triangle a diameter. The fact that these...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G C Right Triangles Inscribed in Circles Ii

For Teachers 9th - 10th Standards
In this task, students analyze the characteristics of a right triangle that has two sides labeled with midpoints and show that the triangle is inscribed in a circle with a diameter the length of its hypotenuse. Aligns with G-C.A.2.
Activity
Math Open Reference

Math Open Reference: Circles

For Students 9th - 10th Standards
A complete reference guide to circles including parts, angles, and arcs. It provides definitions and interactive activities that enhance further explanation.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Angles on and Inside a Circle

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] Solve problems containing angles on or inside a circle.
Handout
Math Open Reference

Math Open Reference: Parts of a Circle

For Students 9th - 10th Standards
Learn about parts of a circle with this pictorial index. Click on the diagrams for more information. Includes links to related topics.
Unit Plan
Open Curriculum

Open Curriculum: Beginning Harmonic Analysis

For Teachers 9th - 10th
To introduce harmonic analysis of chords and provide an overview of the relationship of chords, keys, and triads
Website
Other

Dave's Guitar and Bass Resource Page

For Students 9th - 10th
This resource contains information on intervals, scales, and chords for the string bass guitar. Also includes reference charts for chords and intervals.
Unit Plan
Open Curriculum

Open Curriculum: Enharmonic Spelling

For Teachers 9th - 10th
To provide an explanation of notes, chords, keys and scales using enharmonic notes
Unit Plan
Open Curriculum

Open Curriculum: Naming Triads

For Teachers 9th - 10th
To explain how different chords are named based on their position

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