Curated OER
Moving On: Octagoning the Circle
Students explore circles through the use of octagons. They inscribe a circle in a regular octagon and find the area and perimeter of the hexagon with respect to the radius of the circle. Students present their findings to the class.
Curated OER
Around We Go
Fourth graders investigate a range of circles, each with a different radius, diameter and circumference and assemble this information in their search for relationships.The measurement of circles and the relationships to be found within...
Curated OER
"Slice of Pi with Neo-Excel"
Learners explore diameter, radius, and circumference. They define radius, diameter, and circumference on an online dictionary, identify objects in the room with a radius and a diameter, and calculate the radius and diameter of various...
Curated OER
From Caterpiller to Butterfly: Cycles, Circles, and Patterns
Young scholars examine art of butterflies and discuss what they know about the insect. They create their own butterfly puppets and write a story to represent its life cycle.
Curated OER
Pattern Puzzlers
Students identify triangles, circles, and squares, then show their understanding of patterns by continuing a pattern that contains three different elements. They utilize worksheets imbedded in this plan to practice using these shapes.
Curated OER
The Librarian Who Measured the Circumference of the Earth
Sixth graders explore angles, triangles, and investigate the circumference of the earth. They participate in a Webquest, access data bases, and communicate with other students through an on-line project site involving the circumference...
Curated OER
Area graphics for 7th graders
Young scholars randomly select dimensions for three geometric shapes (square, right triangle and circle). From the graphs they compare and contrast the graphical results of each shape.
Curated OER
Observing Mars in the Night Sky
Students compare and contrast the orbits of Earth and Mars, locate the planet Mars, and diagram its retrograde motion.
Curated OER
"Use an Anemometer," said the Meteorologist
Students participate in an hands-on construction of an instrument to measure wind speed.
Curated OER
Wheeling Around
Eighth graders explore the characteristics of a circle and the formulas to find circumference. They use a bicycle wheel to determine the circumference around a wheel. They utilize a worksheet imbedded in this plan which has a variety of...
Curated OER
Square Circles
Young scholars analyze and demonstrate how a circle can be measured in square units and examine how diameter, circumference and radius are related.
Curated OER
What Does It Take?
First graders study the attributes of circles, squares, triangles and rectangles. They sort shapes that are the same and those that are different into groups.
Curated OER
Investigating the properties of a circle
Students use wax paper to look at different properties of circles such as chords, tangent lines, inscribed angles, and inscribed angles in a semi-circle, as well as finding the center of the circle, and use GSP to investigate cyclic...
Curated OER
Pumpkin Math
Students examine a pumpkin and make several estimations based on the number of lines around it, its circumference and the number of seeds it has.
Curated OER
Elastic Band Shapes
Students identify basic shapes (triangle, square, rectangle, circle), create shapes with different body parts, and create shapes at various levels (high, low)
Curated OER
Trigonometry Realms
Excellent site reviewing the realms of Trigonometry. Topics Include the trig functions, graphs, right triangles and much more.
Science Buddies
Science Buddies: Throwing You Some Curves: Is Red or Blue Longer?
This a straightforward, but interesting, project in geometry. It is a good first proof to try on your own. You should be able to figure it out by yourself, and you'll gain insight into a basic property of circles.
Oswego City School District
Regents Exam Prep Center: Circles
Use this lesson, practice quiz, and activity when planning classroom instruction on graphs and equations of circles.
![Pbs Mathline: Bubble Mania Lesson Plan [Pdf] Lesson Plan](https://static.lp.lexp.cloud/images/attachment_defaults/resource/large/FPO-knovation.png "Pbs Mathline: Bubble Mania Lesson Plan [Pdf] Lesson Plan")
PBS
Pbs Mathline: Bubble Mania Lesson Plan [Pdf]
Determine the area, diameter, and circumerfence of a bubble residue by creating a soap solution and blowing bubbles.
Government of Alberta
Learn Alberta: Math Interactives: Exploring Circle Geometry Properties
Investigate circles, namely their angles, chords, and tangents using this highly interactive Learn Alberta math. Explore a number of circle geometry properties that can be used to determine unknowns. Be sure to follow the link to the...
McGraw Hill
Glencoe: Self Check Quizzes 2 Circles and Circumference
Use Glencoe's Math Course 2 randomly generated self-checking quiz to test your knowledge of circles and circumference. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click...
Unite for Literacy
Unite for Literacy: Know and Learn: I See a Circle
A book about circles in the world around us. Includes audio narration in 6 additional languages with text in English.
Texas Education Agency
Texas Gateway: Making Conjectures About Circles and Angles
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 of and relationships among the resulting angles.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Circle Exercises
Twenty-five problems cover various circle activities. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View Solution" button to check each step of your...