¿Cómo crece el pasto? (How Does Grass Grow?)

Kids often play with magnets, yet they don't learn how these playthings work for many years. Practical knowledge from their play can help them learn more about magnetism, and so can this book. Specially written for those with reading challenges or readers looking for a review, the main text covers important vocabulary, magnetic fields, and a discussion of why metals and magnets come together. Diagrams and succinct fact boxes offer additional ways to learn each concept and explain some ideas in greater detail.

Have you ever seen a skyscraper that is shaped like an elephant? How about one that looks like waves? Students will learn how to measure area while engaged in reading about the world's coolest skyscrapers! This Spanish book uses real-world examples to teach math concepts, and incorporates nonfiction reading to increase vocabulary and comprehension skills. The practice problems, graphs, and sidebars provide many opportunities for students to practice their developing math skills, and apply what they've learned to their daily lives. Essential text features like a glossary, index, and table of...

What is work? You may think work is doing chores or going to a job, but you do work every time you move something from one place to another. With experiments that demonstrate these fundamental concepts, discover how you work, and how simple machines make doing work easier.

La Ilíada, compuesta en el siglo VIII a.C., narra una leyenda micénica situada en el siglo XIII a.C., una edad heroica dominada por los aspectos militares, el individualismo desenfrenado y la persecución de la riqueza y la gloria. La Ilíada cuenta un episodio de la epopeya de la rica y estratégica ciudad de Troya, o Ilión. Es el poema de la cólera de Aquiles, hijo de mortal y diosa y el más destacado de los combatientes griegos, en su afán de heroicidad y sus ansias de venganza. El poema de una gran guerra que afecta a multitud de seres humanos, víctimas del enfrentamiento personal...

Explains what mathematics is and how it feels to do math, and shows some basic mathematical concepts such as sorting and measuring.