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Figuring Out Fluency - Addition and Subtraction with Whole Numbers: A Classroom Companion - John J. Sangiovanni
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McFadden, Rosalba: - Rosalba Serrano is an elementary mathematics consultant in New York and is the founder of Zenned Math, where she provides online professional development and coaching for elementary mathematics teachers. Rosalba has used her experience as a classroom teacher and mathematics coach to support teachers in deepening their understanding of mathematics and their use of effective teaching practices. A frequent speaker at both regional and national conferences, Rosalba is also active in mathematics organizations such as the National Council of Teachers of Mathematics, where she contributes to multiple committees. She has also worked as a professional development facilitator for various mathematics organizations and consults as a math editor for a number of publishing companies.