The purpose of this unit is to expedite student learning in language arts, science, and nonfiction reading. It's a content-based vocabulary and spelling unit. Students will double their exposure to key terms related to Earth's Natural Systems, while improving their spelling (with challenging words) and word knowledge. The unit includes leveled assignments and tests to challenge your students at their own level of learning. Lessons and practice can also be enhanced by accessing online resources and activities using this specific unit list. The directions for online access are included in the file. The preview gives you a full picture of the unit materials in this packet.