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Dr. Wall discusses a new research study from the University of Padua, regarding the natural development of the mental number line. What are the implications for classroom teachers? Find out more at www.thedtri.org and www.educalclearning.com.

Dr. Wall discusses a new research study from the University of Padua, regarding the natural development of the mental number line. What are the implications for classroom teachers? Find out more at www.thedtri.org and www.educalclearning.com.