Book excerpt: Mingle in some math to everyday teaching! Fast Ideas for Busy Teachers: Math has hundreds of ideas that will fit into a hectic schedule and enliven fourth-grade students' exploration of mathematics. The book is organized by math skills, which makes it easy to find a topic when it's needed. Open-ended lessons allow adaptation of activities to meet students' needs. The lessons are perfect for substitutes, rainy-day activities, homework, and in-class assignments. The book includes tips for managing a classroom, getting organized, getting to know students, and implementing behavior management. This 80-page book also includes reproducibles and aligns with Common Core State Standards, as well as state and national standards.