La historia de los sistemas numéricos: Valor posicional (The History of Number Systems: Place Value)

William Ellsworth Hoy amaba el beisbol sobre todo lo demás. Cuando le dijeron que era muy pequeño para el equipo de su escuela, no dejó que nada lo detuviera, ¡ practicó hasta ser lo suficientemente bueno como para jugar en las grandes ligas! Ser sordo en las grandes ligas no fue fácil, ya que poca gente usaba el lenguaje de señas en la década de 1880. A William se le dificultaba leer los labios en el campo de juego y algunos jugadores lo intentaban confundir. Pero tampoco dejó que eso lo detuviera. ¡William les enseñó a los ampáyeres a hacer señas de mano para que pudiera ver...

Introduces The Technology Of Transportation Of People And Goods By Means Of Trains, Planes, Subways, Buses, Automobiles, Ferries, Trailers And Tractors.

This Spanish book introduces students to the concepts of growth and change. With images that are easy to identify and clear, simple sentence structures, this science reader simplifies scientific concepts for young students as they improve their reading skills. A fun and easy science experiment and Your Turn! activity provide more in-depth opportunities for additional learning. Nonfiction text features include a glossary and an index. Engage students in learning with this dynamic text!

Many people take the Internet for granted. But there are places that lack Internet access. Being connected helps people connect, and new ideas are being developed and tested to bring the Internet to more of the world. This Spanish nonfiction book will keep students engaged in reading about Internet access as they build their literacy, vocabulary, and comprehension skills. Important text features include a glossary, index, and table of contents. The Reader's Guide and culminating activity require students to connect back to the text as they develop their higher-order thinking skills. Check It...