Curated OER
Perimeter and Area
Pupils review concepts of area and perimeter, find area and perimeter of circles, practice calculating circumferences with a calculator, and calculate area using pi button.
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Using Math Concepts to Collect and Document Specimens
Students determine the length and width of leaf samples to the nearest millimeter and the circumference of trees. They participate in a discussion about the importance of collecting specimens carefully. They compile accurate...
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A Dreamer's Cloak
Students listen to the teacher read "A Dreamer's Cloak." They examine the difference between squares and circles and create their own cloak by using a paper bag and different shapes.
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"School Shape Scavenger Hunt"
Students, in groups, venture onto the schoolground on a scavenger hunt for shapes. They are given tasks: recorder, team leader, presenter, reporter, and behavior guidelines and a time limit. They search the school for shapes found in...
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How Big Is a Piece of PI?
Learners explore the ratio of circumference to diameter in order to estimate a value for pi.
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Geometry in Nature
Students examine how the circumference, diameter, and the relationship of Pi of a circle are related. They count the summer rings of a tree to determine its growth.
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Measuring the Earth
Students identify types of arcs and angles in a circle, find the measure of arcs and angles, and solve real world problems involving lengths of segments in circles, lengths, and areas.
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Finding The Circumference Given The Radius
Students develop an understanding of pi and the relationship between the diameter, radius and circumference. After a lecture/demo, students use construction paper and a compass to solve problems using diameter, radius and circumference.
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Taxicab Metric, Circle
Students create a circle using the taxi-cab metric. For this geometry lesson, students identify the properties of circles. They identify the idea of geometric shapes and how they come about.
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Circular Motion
Ninth graders explore circular motion. In this centripetal force lesson students complete a lab activity while in groups.
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Circle Terminology
In this geometry activity, students identify radii, diameters, chords, tangents, secants and other terminology associated with circles. The one page activity contains eighteen problems. Answers are not provided.
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THE AREA OF A CIRCLE
Students examine the relationship between circumference and diameter and how to use the formula to find the area of a circle. In this circle lesson plan students divide into groups and complete an activity.
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Measuring the Sun's Diameter
Students project and measure the suns image using a refracting telescope. In this sun's diameter instructional activity students calculate the magnification of the telescope and determine the diameter if the Sun.
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Building a House Using Circles
Learners study circles and problem solving. In this critical thinking lesson, students build a house using all of the circles given to them gluing them onto paper.
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Kinematics of the Planar Continuum Snake Robot
Students calculate the length of an arc that surrounds an angle at the center of a circle of radius. For this kinetic equations lesson students complete a lab and solve a kinematic equation.
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Whiskery Lake Problem
In this Geometry worksheet, 10th graders solve a problems involving area of a circle given information regarding surface area. The one page worksheet contains one problem with answer.
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Care Homework #2
In this Care Homework worksheet, students solve a variety of multiple digit addition, subtraction, multiplication, and division problems that include fractions, decimals, and percentages. They demonstrate knowledge of geometric formulas...
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Circle Equations
Young scholars explore the coordinate plane. In this secondary mathematics instructional activity, students follow a set of directions to plot points in the coordinate plane.
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Evaluating the Products of Chords of a Circle
Students investigate chords and make predictions. In this geometry lesson, students graph circles and calculate the measurement of each chord. They perform the calculations and make conjectures.
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Identifying Shapes
In this identifying shapes worksheet, 3rd graders identify the picture and choose its correct shape from the choices given, then check answer online.
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What do you know?
In this newspaper article activity, students listen to the article their teacher reads and put a check if they know about the sentences the teacher reads or a circle if it is new information. Students do this for 6 sentences.
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The Circumference of a Pumpkin
Students complete a pumpkin circumference activity. In this pumpkin circumference lesson plan, students make a raw estimate and use a string to measure the circumference of a pumpkin. Students also define the term circumference.
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Calculate Radius and Diameter, Estimate Circumference #2
In this radius, diameter and circumference activity, students calculate diameter and estimate circumference of 2 given circles. A reference web site is given for additional activities.
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Rectangles and Squares
Students identify two dimensional shapes in the school environment. In this basic shapes instructional activity, students watch a video about rectangles and squares. Students find examples shapes in their classroom and draw them....