Marian Small is the former dean of education at the University of New Brunswick and longtime professor of mathematics education. She is widely known for her bestselling books and her in-district work with educators in the United States and Canada. Visit her website onetwoinfinity.ca for in-person and online professional development.
"A must for any educator who is serious about reaching more students more often and achieving more positive results." -- Resources for the Mathematics Educator (from previous edition)
I recommend this book for pre-kindergarten through eighth grade mathematics teachers wanting to learn classroom differentiation strategies and to those wanting to extend their knowledge of open questions and parallel tasks -- Mathematics Teaching in Middle School