Barbara R BlackburnBarbara R. Blackburn, PhD, a top 30 Global Guru in Education, is the author of multiple books, including Rigor Is NOT a Four-Letter Word, Rigor and Assessment in the Classroom, Rigor and Differentiation in the Classroom, Rigor i the RTI and MTSS Classroom, and Rigor in Your School: A Toolkit for Leaders. She is an international speaker and regularly provides schools and districts with professional development. Read More Read Less
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