Divisibility Tests for 3 and 9

Who knew the sum of a number's digits gives such interesting information? The 18th installment of a 21-part module has scholars investigate division by three and nine. After looking at several examples, they develop divisibility tests with the guidance of the instructor.

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CCSS: Designed
Instructional Ideas

  • Challenge scholars to find numbers that are divisible by multiple values
Classroom Considerations

  • Lesson assumes individuals already know divisibility rules for 2, 4, 5, 8, and 10
  • Pupils should have knowledge of the distributive property and place value understanding
Pros

  • Requires learners to explain reasoning
  • Includes some scaffolding tips
Cons

  • None
Common Core