Which would you do in your head?

Watch the video

(Inspired by McIntosh, Reys, Reys and Hope, Number SENSE: Simple Effective Number Sense Experiences, Grades 4-6, 1997)

Transcript for video 1

Transcript coming soon.

Collect resources

You will need:

  • pencils or markers

  • your mathematics workbook.

Instructions

  • Which of these problems would you solve using a mental strategy?

  • Which of these problems would you solve using a written or digital strategy?

  • Record your thinking in your workbook.

  • Survey your classmates.

    • Is there a problem that everyone would use mental strategies for?

    • Is there a problem that everyone would use a written or digital strategy for?

When you're ready, watch the follow-up video

Transcript for video 2

Transcript coming soon.

Reflection

  • Are there any problems that you would now rethink and solve mentally that you previously thought you use a written or digital strategy for?

  • Record your thinking in your workbook.