Cumpleaños feliz

"Some things are so huge or so old that it's hard to wrap your mind around them. But what if we took these big, hard-to-imagine objects and events and compared them to things we can see, feel and touch? Instantly, we'd see our world in a whole new way." So begins this endlessly intriguing guide to better understanding all those really big ideas and numbers children come across on a regular basis. Author David J. Smith has found clever devices to scale down everything from time lines (the history of Earth compressed into one year), to quantities (all the wealth in the world divided into one...

Learn the secrets to artful cupcakes, oven-fresh bread, and other delicious baked goods in this delightful nonfiction title. Readers will learn how mathematics helps bakers measure their ingredients to make tasteful treats. Featuring vibrant images and charts, informative text, and fun, intriguing facts, this Spanish-translated nonfiction book will leave children fascinated by all the details that go into baking their favorite treats--like doughnuts and cookies! This 6-Pack includes six copies of this title and a lesson plan.

África tiene muchas caras: exótica y misteriosa, peligrosa y cruel, triste y explorada. Pero es mucho más que eso, es el lugar del origen del hombre, una tierra llena de historia y cultura. Es un continente con una geografía variada: 54 países donde conviven hombres y mujeres de culturas diferentes, que se expresan en más de mil lenguas. En África hay muchos países, todos ellos muy diversos, muchas religiones, ciudades populosas, aldeas, grandes líderes, mitos y colores. Estas son las otras Áfricas que se muestran en este libro.

People have been sending mail for a long time. But how they do it has changed a lot! Read about the history of mail as you learn to collect data. This Spanish math book combines math and reading skills and uses real-life examples of problem solving to teach subject-area content. The dynamic images, detailed sidebars, practice problems, and math diagrams make learning data measurement easy and fun. Text features include a table of contents, a glossary, an index, and captions to build vocabulary and increase understanding of math and reading concepts. An in-depth problem-solving section...