Los huesos de Descartes

Where did the sunflower come from? How does it grow so tall? How can its thin stalk support such a large and heavy head? These and many other questions are answered in this dazzling book. Using lushly detailed illustrations and photographs, the book takes us inside the sunflower to examine its stem, root system, leaves, and flowering heads, proving an understanding of this unique plant's structure, growth, flowering, reproduction, and cultivation.

The Mapuches established themselves in the eleventh century in what is now Argentina and Chile. Their literature is very rich and oral in nature, which highlights the legends that speak of their Gods, beliefs, customs, and stories of their encounters with enemies.

Carlos goes into the cloud forest to look for animals, but he manages to miss seeing them even though they have an adventure with his umbrella.

Forces and motion are key concepts in the elementary science curriculum. This Spanish edition of How Simple Machines Work uses simple text and full-color photographs to help ELL students understand the principles behind simple machines. Each volume includes three diagrams to enhance comprehension. The text uses authentic language and is designed to build reading skills as well as knowledge of basic science concepts.