Por qué?

Advances in science have changed our world, all thanks to the scientists behind important discoveries. Some of the most important discoveries have come from female scientists, who were as unique for their work as they were for being trailblazers in a male-dominated industry. This text offers a biographical treatment of such important scientists as Marie Curie, Rachel Carson, and Jane Goodall, as well as others who have made it possible for women of the future to have a career in science. Age-appropriate text, fact boxes, historical and modern images, and a comprehensive timeline complete the...

Presents a typical day of a bulldozer driver, with the safety equipment he puts on, the levers, beeper, and blades he uses in its operation, and what he does to get the bulldozer ready for the next day.

GRADES PK–2: This 16-page Spanish title (8’’ x 8’’) introduces early readers to the spotted hyena: how they find food, interact with social groups, and more! FEATURES: Simple Spanish text and vivid photos present fascinating facts about an amazing African animal. Comprehension questions are included to advance learning. EARLY BILINGUAL LITERACY: Help young learners strengthen their bilingual skills—add the English version of this title into your collection, too. BUILD A LIBRARY: Collect every title from the collection to stock your home or classroom library. Reading together is a...

Los problemas y retos del medio ambiente cada día están más presentes tanto en los medios de comunicación como en la agenda de los gobiernos. La ecología es una disciplina altamente compleja, porque en ella convergen ciencias como la biología, la meteorología o las políticas económicas e industriales. 105 ideas de ecología ha sido diseñado para acercar al lector de a pie a las cuestiones medioambientales que afectan al presente y al futuro de nuestro planeta. De la biodiversidad al efecto invernadero, pasando por conceptos como el nicho ecológico o el bioma, este pequeño gran...