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- Grade Range
- 7th - 12th
- Rating
Students practice determining if a number is prime or composite. 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
- 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
- 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
- 5th
- Rating
Students solve problems by choosing strategies, explaining their reasoning, making calculations, and checking results. They are given a hundreds chart, students find all the prime numbers up to 100. Students work in groups of three or four to find other rules for identifying composite numbers. Full Review »
- Grade Range
- 7th
- Rating
Students listen to instruction concerning prime numbers observing examples that the teacher gives. They then answer questions asked by the teacher to check for understanding such as: "What are the first five multiples of 5?". Next they copy the order of operations table in their journal and discover the reasons why they must be followed. 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
- 8th
- Rating
Students explore the rules of divisibility, prime and composite numbers and multiples. They define the rules of divisibility and use repeated division to divide a number by the smallest prime number possible. Students repeat the process dividing by prime numbers only. Full Review »
- Grade Range
- 7th
- Rating
Students, through teacher instruction and guided practice, discover how to test and correctly identify the prime numbers and state the rule as to why they are prime. They complete complete a worksheet independently, following the same rules. 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 »