Janine M. Firmender, Tutita M. Casa, and Madelynn W. Colonnese

Promote students’ reasoning with different types of and purposes for mathematical writing.

Darrell Earnest, Susan Radtke, and Siri Scott

Fourth graders engage in mathematical reasoning and problem solving that leads to insights about the relationship between hour and minute units.

Jessica F. Shumway and Lauren Pace

Learn how to plan purposeful opportunities for children under five to experience mathematics.

Kendra Lomax, Kristin Alfonzo, Sarah Dietz, Ellen Kleyman, and Elham Kazemi

An extended vignette demonstrates a new take on problem solving: how to provide multiple entry points for K–grade 2 learners, leverage their intuitive understandings of the world around them to make sense of and solve problems, and engage them in rich mathematical modeling.

Wendy S. Bray and Tanya Vik Blais

Contextualized multiplication and division problems involving groups of ten can be powerful tasks for engaging K–grade 2 learners in reasoning about the base-ten structure of numbers.

Angela Chan Turrou, Megan L. Franke, and Nicholas Johnson

This vivid illustration of an instructional activity highlights the range of opportunities available for a teacher to leverage students’ thinking and support rich mathematical discourse.