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

The use of calendars dates back thousands of years. Why are we driven to record time, and what would happen if we did not? Who created the concept of calendars? Why do different cultures use different calendar systems? And why are calendars so important to us? It is about "time" we found out! Created in collaboration with the Smithsonian Institution, this Spanish-translated Smithsonian Informational Text builds reading skills while engaging students' curiosity about STEAM topics through real-world examples. Packed with factoids and informative sidebars, it features a hands-on STEAM challenge...

Alex Chico -- Urbano Pérez Sánchez -- Fernando de las Heras -- Angela Sayago Martínez -- Ursula Rodríguez -- David Yáñez -- Fernando Pérez Fernández -- Julián Portillo -- Francisco Fuentes -- Víctor Martín Iglesias -- Víctor Peña Dacosta -- Angela Cayero -- Francisco José Najarro Lanchazo -- Antonio Rivero Machina -- Patricia Amigo

With over one million sold in the series, these books deal with concerns youngsters encounter in their daily lives. Each book points out the good news of God's love and forgiveness, while the supporting Scripture verse emphasizes the point of each story.

En el Ártico, cada vez se derrite más hielo en verano. Esto es un gran problema para los osos polares, que necesitan el hielo para sobrevivir, y también es un gran problema para todo el mundo, por que todo nuestro planeta necesita el hielo del Ártica para