Las cadenas alimentarias en el desierto (Desert Food Chains)

Even the smallest tide pools are actually entire ecosystems! The creatures that call a tide pool home are connected through food chains that represent the passing of energy from one living thing to another. Readers discover how these unique food chains all come together as they view a helpful tide pool food web. Fun fact boxes accompany informative text about life in a tide pool. Detailed photographs of tide pool ecosystems introduce readers to a variety of cool creatures.

Go for the goal with this text, which examines fascinating female sports heroes who’ve proved to the world that gender is no barrier to athletic success. Readers will delight in learning about the lives of Mia Hamm, Wilma Rudolph, and the Williams sisters, as well as other important women who’ve broken barriers in sports. Readers will be inspired to pursue a career in athletics after learning about how others have achieved success in spite of great obstacles. The biographical nature of the text supports social studies curricula, and fact boxes and a comprehensive timeline provide...

Imagine traveling at half the speed of a jet plane without ever leaving the ground! Students will discover the technology that makes such speeds possible, from special tracks and safety precautions to aerodynamically designed trains. What are the limits to the speed of trains? What imposes those limits? Students also will read about the future of passenger train travel, from flying trains to trains that use huge magnets to levitate inches or centimeters off the track. Some trains safely reach speeds of more than 200 mph!

En 1917 el Endurance daba por concluida una fracasada e histórica expedición a la Antártida que zarpó al comienzo de la Primera Guerra Mundial. Sir Ernest Shackelton partió al mando de esta última gran aventura polar sin esperar siquiera alcanzar la meta, constatando que los mapas son a veces simples imposibilidades. ¿Hasta dónde se puede confiar en el orden que se presenta como inamovible? Travesías por la incertidumbre cuestiona el sistema de certezas sobre el que la cultura de Occidente ha conformado su pensamiento y el sistema lógico que ha impuesto al mundo durante largos...

This is a short fun book for children, showing them math simplified so they can learn it’s not hard and that it’s necessary to learn math in life. There are math questions and situations in this book showing that math can be applied in daily life. The book is also bilingual, meaning you can also introduce your child to Spanish or English. Math is a subject many children are scared of and tend to not embrace. This novel is made to break down some math, and the math problems are for children of a young age, for them to analyze and use critical thinking. The book features a nice math teacher ...

Después de buscarla por todo el pueblo, Miguel encontró a su cabra subida a lo alto de un tejado. ¿Se creerá que es una veleta? ¿O una chimenea? ¿O tal vez un gato?, se preguntaba Miguel. Una historia ideal para contar a los más pequeños antes de ir a dormir. Un cuento con el texto imprescindible, apoyado con ilustraciones dinámicas y caricaturescas que destilan detalles cómicos e información estimulante para la imaginación.