Primeros Ejercicios de Calculo

This fascinating narrative gets under the skin of the world’s tallest buildings! How many people are involved in creating a skyscraper? What environmental factors come into play? What does it take for a skyscraper to function? All these questions and more will be answered as we visit the skyscrapers from New York to Malaysia to China. Students will gain a deeper understanding of skyscrapers and how they shape our world.

¿Alguna vez te has quedado mirando a tu perro y te has preguntado en qué estará pensando? ¿Has meditado sobre el sentido de la vida o has intentado imaginarte la nada más absoluta? Pon en marcha tu sentido común y prepárate para hacer frente a esos grandes enigmas que nos acompañan todos los días. ¡Embárcate con nosotros en esta aventura en la que se mezclan los pensamientos razonables con las ideas más descabelladas!

On April 7, 1805, Sacagawea left Fort Mandan to begin the famous westward exhibition with Lewis and Clark. With over 100 black-and-white illustrations, Sacagawea's fascinating journey and life story comes to life in Spanish!

Thomas Edison is considered by many to be one of the greatest inventors of all time. His creations changed the world, but there was more to his life than just his inventions. Readers of this engaging volume will learn all about the man behind the innovations. This fascinating biography introduces important subjects and encourages a further interest in history. Concise and accessible text paired with vibrant photographs is sure to captivate audiences of many ages and levels.