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Local to the D.C. area: 1-703-578-9600
Toll-free from U.S. and Canada: 1-800-933-ASCD (2723)
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This is also an excellent guide for school leaders and teacher coaches who want a tried-and-true model for classroom walkthroughs that will open teachers' eyes to the strengths and weaknesses of their classroom practices.
(ASCD Premium Member book, February 2015) 8" x 10", 190 pages