Tu cuerpo mola (aprende a descubrirlo)

What causes sound? How does sound travel? Sound begins when matter vibrates. Without this vibration sound could not move and nothing would make any noise. Starting with tiny molecules, this book explains the main concepts of sound and furthers understanding through a series of easy-to-do experiments that will appeal to readers of all ages.

Jacques Cousteau fue uno de los oceanógrafo más importante del mundo. Fue un personaje que no solamente amó el mar, sino que además quiso que el mundo entero conociera sus maravillas. Así que este libro está dedicado a conocer su vida y todo el trabajo que realizó en pro de la ciencia. Descubre la magia de ser un explorador.

For use in schools and libraries only. Say Curtis describes his meeting with Pinkus Aylee, a black soldier, during the Civil War, and their capture by Southern troops. Based on a true story about the author's great-great-grandfather.

Born into slavery, Frederick Douglass relied on his own determination and ingenuity to carve a path to freedom. Once free, he dedicated his life to improving the lives of others and fighting for justice and equality. This inspirational Spanish biography uses primary sources to engage students in learning about the fascinating life of Frederick Douglass. Students will build their literacy skills as they are immersed in social studies content. Text features include a glossary and an index to increase comprehension and academic vocabulary.