Prime Time

How many prime numbers are there between 1 and 100? By using a prime time resource, your scholars should be able to answer this question. Using arrays, they determine if numbers are prime or composite, and then write a prime factorization for each number from 1 to 100.

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Instructional Ideas

  • Have each classmate pick a three-digit number and find its prime factorization as homework
Classroom Considerations

  • Learners should be familiar with the relationship between arrays and multiplication
  • Instructors will need to cut out cards before the lesson
Pros

  • Provides a worksheet for pupils to record answers
  • Lists detailed steps for the lesson
Cons

  • None