publisher of Principles and standards for school mathematics Navigations series: Navigating through reasoning & proof in grades 9-12. Reston, VA. 2008 Mathematics teaching today: Improving practice, improving student learning. Reston, VA. 2007 IDEAS from the Arithmetic teacher : grades 4-6, intermediate school. Reston, VA. 1986 Curriculum and evaluation standards for school mathematics addenda series, Grades 5-8: Understanding rational numbers and proportions 1994
