The Next Billion

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A billion people here, a billion people there, world population is really starting to add up. Individuals look at past world population data to estimate when the population will surpass the next billion. Proportional reasoning is the preferred method here.

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Instructional Ideas

  • Have the class look up actual world populations and use the updated data in the lesson
Classroom Considerations

  • Pupils must be able to convert between different units of time
  • Learners should have experience with proportional reasoning
Pros

  • Includes a student worksheet
  • Provides questions to use during the lesson
Cons

  • Resource is a bit outdated, given that world population is currently over seven billion