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- Grade Range
- 5th - 9th
- Rating
Students follow a systematic method of deciding if a number is prime or not. Then students watch as prime and composite numbers seem to magically separate during interesting activities. 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
- 8th - 9th
- Rating
Students complete a unit of lessons regarding building a more complete earth model. They calculate the circumference of a sphere, locate specific positions on a map or globe using coordinates, and write summaries of the earth's apparent shape. Full Review »
- Grade Range
- 8th
- Rating
Students review their understanding about numbers and number systems through playing the Number Game. They create a list of numbers and based upon the characteristics and properties of the numbers they will earn points. 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
- 6th - 8th
- Rating
Students determine whether a number is prime or composite. They identify all the whole number factors of a composite number. Pupils explore and use divisibility rules. Students use strategies to determine prime and composite numbers and to arrange a composite number's factors in a rainbow pattern. Full Review »
- Grade Range
- 6th
- Rating
Students identify prime and composite numbers and complete an activity problem. Given a 100 chart, they follow directions to create a prime number chart. In groups, students play a "Prime Take Away" activity to reinforce prime numbers. Full Review »
- Grade Range
- 5th
- Rating
Students use prime factorization to identify prime and composite numbers. They use cubes to find factors. In groups, students draw rectangular arrays to discover prime numbers under 100. Full Review »
- Grade Range
- 5th
- Rating
Students use interlocking cubes to build towers to represent factors of numbers and place the towers in the appropriate places on a Tower chart in order to look for patterns. They work in partner groups, and finish by writing statements about prime numbers, composite numbers, and patterns they noticed during the activity. Full Review »
- Grade Range
- 4th
- Rating
Students investigate the concept of prime and composite numbers. Students study the visual representation for the numbers and use the pictures in order to develop designs for larger numbers. The goal of the lesson is for them to recognize that large numbers are the product of others. Full Review »
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