Do you work tirelessly to make your math lessons meaningful, challenging, accessible, and engaging? Do you spend hours you don't have searching for, adapting, and creating tasks to provide rich experiences for your students that supplement your mathematics curriculum? Help has arrived! "Classroom Ready-Rich Math Tasks for Grades 4-5" details more than 50 research- and standards-aligned, high-cognitive-demand tasks that will have your students doing deep-problem-based learning. These ready-to-implement, engaging tasks connect skills, concepts and practices, while encouraging students to reason, problem-solve, discuss, explore multiple solution pathways, connect multiple representations, and justify their thinking. They help students monitor their own thinking and connect the mathematics they know to new situations. In other words, these tasks allow students to truly do mathematics! Written with a strengths-based lens and an attentiveness to all students, this guide includes: (1) Complete task-based lessons, referencing mathematics standards and practices, vocabulary, and materials; (2) Downloadable planning tools, student resource pages, and thoughtful questions, and formative assessment prompts; (3) Guidance on preparing, launching, facilitating, and reflecting on each task; and (4) Notes on access and equity, focusing on students' strengths, productive struggle, and distance or alternative learning environments. With concluding guidance on adapting or creating additional rich tasks for your students, this guide will help you give all of your students the deepest, most enriching and engaging mathematics learning experience possible. [For "Classroom-Ready Rich Math Tasks, Grades K-1: Engaging Students in Doing Math. Corwin Mathematics Series," see ED615093. For "Classroom-Ready Rich Math Tasks, Grades 2-3: Engaging Students in Doing Math. Corwin Mathematics Series," see ED615090.]