How Do You Measure Time?

Provides an overview of the design, uses, weapons, and equipment of U.S. Navy submarines. Written in English and Spanish.

Besides oil, Texas has long been associated with cattle and agriculture. Learning about these industries will allow readers understand how valuable their development is to the growth of the state of Texas, as well as America's economy.

Have you ever looked up at the night sky and been fascinated by the scattered twinkling lights? You are not alone! People have been captivated by the stars for thousands of years. Learn all about stars with this Spanish science reader that brings the power of science and informational text to students at a level they can understand. This nonfiction book introduces students to STEM topics and new concepts and vocabulary terms like black hole, nebulae, luminosity, supergiant, and supernova. With detailed images and fascinating sidebars, the leveled text supports students reading at above-,...

¡Es la hora de comer, y Abuela está cocinando! En A mi abuela le gusta cocinar, aprenderá a decor los nombres de diferentes clases de comida y bebidas en español y en ingles. (It’s dinner time, and grandma is cooking! In A mi abuela le gusta cocinar, you will learn how to say the names of different kinds of foods and drinks in Spanish and English!) A visit to Grandma’s house for dinner is a fun-filled, tasty event. And of course, dinner is not complete without dessert. What will Grandma make for dinner? Through simple text and beautifully-illustrated art, young readers learn the names ...

La cultura medieval islámica ha dado figuras espléndidas. Omar Jayyam, poeta y filósofo, algebrista y astrónomo, es sin duda la más fascinante de todas. Su pensamiento fue heterodoxo, su saber inmenso, su obra variadísima. De lo que nos ha llegado de su poesía no siempre es fácil distinguir lo auténtico de lo apócrifo, y de lo que sabemos de su vida, la historia de la leyenda. Su más importante aportación algebraica, la resolución sistemática de las ecuaciones cúbicas cortando cónicas, se procurará poner al alcance de un lector moderno sin alterar las ideas de fondo.