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- Grade Range
- 6th - 7th
- Rating
Students find the circumference given the radius and develop an understanding of pi and the relationship between the diameter/radius and the circumference. Full Review »
- Grade Range
- 3rd - 4th
- Rating
Students are given opportunities to practice measurement skills as they create and examine a soap bubble print. They find the diameter, circumference, and radius of the bubble print. Full Review »
- Grade Range
- 6th - 7th
- Rating
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. Full Review »
- Grade Range
- 6th
- Rating
Students explore and construct circles, using such tools as compasses and rulers. They also develop definitions for identifying the center, radius, diameter, chord, and circumference. Full Review »
- Grade Range
- 4th
- Rating
Students measure circumference, radius, and diameter. They listen to the book, "Sir Cumference and the First Round Table," define key vocabulary terms, and in small groups measure and record the diameter, circumference, and radius of various household objects. Full Review »
- Grade Range
- 6th - 8th
- Rating
Students engage in a hands-on approach to find meaning to the mathematical term (pi). They measure circular objects and develop strategies for calculating the radius, diameter, and circumference. Full Review »
- Grade Range
- 8th - 12th
- Rating
Students examine the relative size of circular objects from the microscopic to the size of the sun. They calculate the center of a circle given the chords of an arc, watch a video, explore various websites, and calculate the center/radius of planets. Full Review »
- Grade Range
- 5th
- Rating
Students identify and draw the diameter and radius of a circle and are knowledgeable of their relationship. They draw and identify pentagons and hexagons. Pupils discuss the definition of the diameter of a circle and explain that the diameter crosses through the center and touches the circle in two places. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students, in small groups, research Eratosthenes and his calculations of the Earth's radius. They write a summary of the person, the experiments and his calculations to determine how accurate Eratosthenes was in his estimations of the size of the earth. Full Review »
- Grade Range
- 6th
- Rating
Students review the three parts of a circle: the radius, diameter and circumference. They practice calculating one of the parts given the other two dimensions and their relationship to one another. They use a spreadsheet program to check their chart work. Full Review »