Ep 138: To Include or Not: An Important Subtraction Pitfall

Do you ever fall into the "off by one" trap? Do your students ever get confused about counting objects vs counting distance? In this episode Pam and Kim use a Problem String to help build intuition about everyday subtraction problems.
Talking Points:

• Experience a Problem String to build relationships
• Fencepost Problems are all over the place
• Students can't just pluck numbers out of Fencepost problems
• Cathy Fosnot's replacement unit, "Measuring For the Art Show"
• Other places these kind of problems show up
• Kim explains her strategy

See episode 111 for more about "Measuring For the Art Show"!

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