Arranged around six "Big Idea" units that explore a unique concept (e.g. "Living things have adaptations that help them survive in their environment," or "Plants have many part. Each part does a special job"), students will learn about life, earth, and physical science. A unit introduction with background information, an overview of the four weekly lessons with vocabulary list, and a week-five unit summary are included. Weekly lessons include a scope & sequence; student activities that incorporate writing comprehension, vocabulary, critical thinking; and information on the key concepts. A hands-on activity for each big idea and reviews are included. 192 reproducible pages, softcover. Answer key included. Grade 3.