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- 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
- 7th
- Rating
Students practice determining the prime factorization of composite numbers. They create Christmas factor trees for prime numbers greater than 100. They decorate their final products with markers, crayons, colored pencils, glitter and glue. 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
- 4th - 6th
- Rating
Students determine factors of numbers to 100 and identify prime factors; students differentiate prime and composite numbers by the factors of the numbers. Full Review »
- Grade Range
- 5th
- Rating
Students are able to describe and identify prime and composite numbers. They are introduced to the names of prime and composite by prime numbers are like 7 because only 1 and 7 can divide into it and not leave a remainder, and composite numbers are numbers like, 6, because 1,2,3, and 6 can divide into it and not leave a remainder. Full Review »
- Grade Range
- 7th
- Rating
Students examine and explain the rules of divisibility, prime and composite numbers, and multiples. They list the rules of divisibilty then practice completing repeated division process of factorization. They also create factor trees to indentify the prime numbers. Full Review »
- Grade Range
- 6th - 12th
- Rating
Students solve problems from a New York Times math quiz related to an article about mathematician Dr. Terence Tao. They then prepare their own math quizzes for which solutions must be expressed in prime numbers. Finally, they consider how they use math in their daily lives, and prepare math problems based on one of their findings. Full Review »
- Grade Range
- 8th - 10th
- Rating
Students examine a Babylonian clay tablet and the mathematics found on it as a catalyst to investigate a variety of mathematical ideas. They produce and work with prime numbers. Students classify numbers as whole, integer, rational, or irrational. They use Heron's method to calculate square roots. Full Review »
- Grade Range
- 6th
- Rating
Students practice implementing manipulative's to assess composite and prime numbers. They formulate representations of rational numbers in a variety of ways including graph paper, sieves of Eratosthenes and multiple worksheets. Full Review »
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