Preface -- Introduction -- Teaching and learning math : landscapes through the years : parents matter : productively supporting your child with math -- Supporting your child's math learning terrain : big math ideas through the grades : shifts in math learning environments : math habits of mind -- Big math ideas in grades K-2 : developing content : classroom scenes -- Big math ideas in grades 3-5 : developing content : classroom scenes -- Big math ideas in grades 6-8 : developing content : classroom scenes -- Collaborative anchor tasks : concept cards : attribute pieces : pattern blocks : monster combos : web-based explorations.