Premium workbook for primary education. An engaging full color workbook filled with focused and effective exercises. Students will work through the following topics: Weather and Climate, Hurricanes, Landslides, Earth's History through Rocks, Fossils and Tree Rings All of OnBoard's lessons are designed by, edited by and evaluated by educators for maximum impact and practical pedagogy. OnBoard lessons cover over 700 topics in K-8 Math, ELA and Science.