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- Grade Range
- 4th - 12th
- Rating
Students, just like Eratosthenes, try to use math to calculate immeasurable objects. Teachers need to try out the calculations before having your class do them. They should take notes to be included with their own calculations and drawings. Full Review »
- Grade Range
- 8th
- Rating
Students find information about primes on the Internet. They use directions for Sieve of Eratosthenes to find primes in the first 100 numbers. After a lecture/demo, students access a website imbedded in this plan to explore prime numbers. Full Review »
- Grade Range
- 3rd - 4th
- Rating
Students study how to find prime numbers. They investigate the teachings of the mathematician Eratosthenes and apply his theory of prime numbers less than 100. Full Review »
- Grade Range
- 4th - 6th
- Rating
Students analyze and discuss prime numbers and the Sieve of Eratosthenes, a procedure to sort out prime numbers. They identify the prime numbers from 1-100 by eliminating all the multiples of the first four prime numbers, and circle what remains. Full Review »
- Grade Range
- 3rd
- Rating
Students listen to information about Eratosthenes and review the definitions: prime, composite, multiples and divisible. They recreate Eratosthenes' method of compiling prime numbers. They create a poster. Full Review »
- Grade Range
- 4th
- Rating
Students play a game with red and green cards (composite and prime numbers). As a card is drawn students create all possible arrays. The winner of each round is the person with the most arrays. Students discuss their results, and define the terms prime and composite. 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
- 9th - 12th
- Rating
Students calculate the radius of the earth. They use the method and data suggested by Eratosthenes. They investigate the interrelationships among mass, distance, force, and time through experimental processes. Full Review »
- Grade Range
- 5th - 8th
- Rating
Students discover the Sieve of Erathosthenes. They explore a method to find all the prime numbers in a group of numbers. Using models, students practice divisibility rules while examining the difference between prime and composite numbers. Full Review »
- Grade Range
- 8th - 12th
- Rating
Students investigate numbers, ways of representing numbers, relationships among numbers and number systems. They comprehend the meaning of operations and how they relate to each other. Full Review »
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