Geoff Krall is an experienced educator, blogger, author, speaker, professional developer and mathematician. He taught math in Texas for eight years before moving to Colorado to obtain a masters degree. After that, he joined the New Tech Network of schools as a Math Coach, delivering coaching, training, and professional development to teachers across the country. While there he pioneered Problem-Based Learning as the primary mode of instruction at NTN schools, training hundreds of teachers and dozens of colleagues along the way.
His first book, Necessary Conditions: Teaching Secondary Math with Academic Safety, Quality Tasks, and Effective Facilitation was published in 2018 and is currently available from Stenhouse Publishers.
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