La antigua Roma (Ancient Rome)

Wind Power: A waving flag, blowing leaves, a kite soaring through the skyall are moved by wind power. Wind is also our fast-growing source of energy. Find out how wind forms and the different ways we may use it in the future.

"El polígrafo abate Vicente Requeno y Vives, jesuita aragonés expulso y apasionado neoclásico (Calatorao, 1743-Tívoli, 1811), se dedicó intensamente en Italia a restaurar todo tipo de artes grecolatinas, consiguiendo un notable éxito en la técnica pictórica del encausto. Por el contrario, su obra filosófica ha quedado inédita en su totalidad hasta el 2008, en que Prensas Universitarias de Zaragoza editó sus Escritos filosóficos. Ahora, y con motivo del bicentenario de su muerte, presentamos un libro colectivo en el que una veintena de historiadores profundizan en la vida y la...

Presenta varios experimentos en cronometría. Para estudiantes de primaria (grados 4-6) y de secundaria (grados 7-9).

Explore the lifecycle of a butterfly and learn about the transformation of caterpillars into beautiful butterflies. The connection to language arts is the rich vocabulary related to butterflies, caterpillars, and their transformations.

Have you ever seen a skyscraper that is shaped like an elephant? How about one that looks like waves? Students will learn how to measure area while engaged in reading about the world's coolest skyscrapers! This Spanish book uses real-world examples to teach math concepts, and incorporates nonfiction reading to increase vocabulary and comprehension skills. The practice problems, graphs, and sidebars provide many opportunities for students to practice their developing math skills, and apply what they've learned to their daily lives. Essential text features like a glossary, index, and table of...