Elementary School Teachers

I am teaching 3-digit subtraction with regrouping and this year my students are having more difficulty than they usually do. Any ideas?

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CRA! Concrete lesson first: so use manipulatives and have them practice that many times together and by themselves. Representational lesson next: draw dots, lines, and boxes. Then abstract: without any of that help - just the procedure. Sometimes you have to bounce between the steps for individual students.

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How do they perform with 2-digit subtraction with regrouping or 3-digit subtraction without regrouping? Assessing for more basic skills might give you a hint about what each student needs. Another more general approach for skill deficits or failure to acquire a new skill is to take a functional analytic approach. Potential reasons student do not acquire skills include: They do not want to do the task. They have not spent enough time doing the task. They have not had enough help to do the task. They have not had to do the task that way before. The task is too difficult (Daly, Witt, Martens, & Dool, 1997 p. 556). Here is the complete article: http://www.ldonline.org/article/6289/

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Manipulative, manipulatives, manipulatives! The combination of hands-on and visuals really helped regrouping click for some of my students who were struggling.

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Try the box method too. My students love it (ok well as much as you can love math).

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