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- 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
- 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
- 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
- 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
- 7th
- Rating
Students compare and contrast prime and composite numbers and multiples. They define and discuss key vocabulary terms and the rules of divisibility. Students observe the teacher model examples of the repeated division process of factorization, factor tree process, prime and composite numbers, and order of operations, and independently complete a worksheet. Full Review »
- Grade Range
- 7th
- Rating
Students compare and contrast prime and composite numbers and multiples. They define key vocabulary terms, read and discuss the order of operations, and observe and participate in a guided lesson that focuses on evaluating numerical expressions, repeated division process of factorization, and rules of divisibility. 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
- 9th
- Rating
Students compare and contrast the rules of divisibility, prime numbers, composite numbers and multiples. They discuss divisibility, the rules of divisibility, and prime and composite numbers. Students practice working with prime and composite numbers. 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 »
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