El dinero y el comercio en nuestro mundo: Read-Along eBook

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.

What will it take to send people to Mars in the next 25 years? Students will learn that problem solving is an essential component of NASA’s planned mission to mars. This Spanish book combines mathematics and literacy skills, and uses practical, real-world examples of problem solving to teach math, language arts, and STEM content. Students will learn problem solving while engaged in reading high-interest content. The glossary, index, and table of contents will further understanding of reading and math concepts, and the full-color images, practice problems, and math graphs and charts make...

Presents a collection of poetry and lullabies by a number of Colombian authors and poets including Jose Silva and Eduardo Castillo.

El abuelo Juan se siente cada día más solo, porque su nieto Ginés se está haciendo mayor, y ya no pasa tanto tiempo con él en la playa o viendo a los pescadores en el puerto. Cree que ya ha perdido el interés y el entusiasmo que demostraba hacia él cuando era un niño. Pero un inesperado acontecimiento va a cambiar el rumbo de sus vidas, que se juntarán de nuevo para luchar por una causa justa.