27 page, detailed, 5 lesson unit on volume. Each lesson has materials and learner background, step by step modeling, guided practice, independent practice, and closure. I have completed this unit with many fifth graders who have been engaged and understood volume by the end of it. All lesson are interactive and involve self-discovered mastery through the use of manipulatives and justification of reasoning. All lesson are aligned to the Common Core standards. Rubrics, checklists, and other assessments are included.