Preocupación

This book provides an introduction to the Spanish language, showing where it is spoken and who speaks it, differences and similarities between Spanish and English, and introducing some key basic vocabulary and phrases.

Experimentos sencillos demuestran los conceptos del medio ambiente como erosión, aireación y camuflaje animal.

What’s the difference between a seal and a sea lion? These “second cousins” of the sea look similar, but there are many ways to tell these creatures apart. From ear shape to the noises they make to communicate, seals and sea lions are amazing creatures with both shared features and many truly unique attributes. They both share an ocean habitat, but when readers take a closer look, it’s easy to discover how they each fight off predators, mate, and raise their young in different ways. Captivating full-color photographs help to bring these marvelous mammals to vivid life.

Bacteria have a slimy reputation. They're too small to see with the human eye, so it's easy to let them slip past unnoticed. But, bacteria are part of our daily lives. In fact, they affect everything from milk to our moods. Get ready to zoom in on the hidden world of bacteria and explore the many ways that bacteria are being used in the modern world. This nonfiction reader seamlessly integrates the teaching of math and reading, and uses real-world examples to teach multiplication of mixed numbers. Text features include images, a glossary, an index, captions, and a table of contents to build...

Durante la Segunda Guerra Mundial, el salón de té Embassy, uno de los centros sociales más elegantes del Madrid de la época, se convirtió en el lugar de encuentro de numerosos agentes y cooperantes secretos de los servicios de inteligencia británicos. Entre ellos, el doctor Eduardo Martínez Alonso, el padre de la autora. En esta histórica, su hija busca demuestrar cómo este médico ayudó directamente en la red humanitaria organizada por el Servicio Secreto británico, que, a través de España, evacuaba a refugiados europeos hacia Portugal y Gibraltar. Miles de perseguidos por el...