Introduces sea urchins, describing their physical features, movement, defense mechanisms, danger to humans, and the role they play in the ocean ecosystem.
Plains, deserts, mountains, and water cover the great state of Texas, giving it one of our country’s most unique geographical landscapes. This book teaches students how Texas’s geography contributed t
"Citizen science--when scientists need observations from ordinary people to build a database and complete research--is hot right now in many science fields. Climate change, migration patterns, plant g
A series that will reveal many surprising facts to middle readers about the United States government and its workings includes fascinating sidebars and age-appropriate informational fact boxes; histor
A series that will reveal many surprising facts to middle readers about the United States government and its workings includes fascinating sidebars and age-appropriate informational fact boxes; histor
