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- Grade Range
- 5th
- Rating
Students review the concept of prime factorization. Then, they use the rules for divisibility and other notions to find the prime factorization of unfamiliar numbers. They solve problems in a whole class setting. Full Review »
- Grade Range
- 5th
- Rating
Students identify the prime factorization for 48 using different sets of factors. They find the prime factorization for 60. 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
- 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
- 6th - 8th
- Rating
Students research prime and composite numbers. With a partner, students use graph paper to draw rectangles of various sizes. They list the dimensions of rectangles and discuss how the dimensions relate to the factors of each number. Students perform the prime factorization of numbers. They find the Greatest Common Factor (GCF) of numbers. Full Review »
- Grade Range
- 3rd - 5th
- Rating
Students explain what it means to square numbers. They explain what it means to cube numbers. Students define prime numbers using their own language. They are introduced to the problem by playing one game as a class. Full Review »
- Grade Range
- 5th - 6th
- Rating
Like all of the Problem Solving units, this one aims to introduce students to the underlying ideas of mathematics through a problem. The problem here requires a knowledge of arithmetic and the use of some algebra. In this unit we see how a mathematical theory might develop through experimentation, conjecturing, proving, generalising and extending. 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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