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

"En este libro te proponemos un recorrido que no te va a dejar indiferente. Porque no el sólo un itinerario por distintos países del mundo, sino que te invita a adentrarte en la escencia del ser humano...,"--Page [4] of cover.

Go-Karts are a fun and thrilling way to hit the road! This exciting, Spanish-translated nonfiction title invites readers to explore different parts needed to build a go-kart, velocity, speed, and how to stay safe in this fun motorsport. Using detailed images, charts and diagrams, informational text, and interesting facts in conjunction with mathematical skills and upper-level features such as a glossary of terms, an index, and a chapter format, readers are sure to be engaged and excited from cover to cover!

Historia es un volumen dedicado al mundo anterior al que hemos conocido, desde la época de los dinosaurios, hasta los primeros hombres primitivos, el antiguo Egipto, los grandes imperios de Grecia, Roma y China, la Edad Media, etc. Incluye ejercicios de atención y vocabulario específico.

Teach students the significance of the capital of the United States, Washington, DC. This Spanish-translated nonfiction book introduces readers to important buildings and monuments in Washington, DC, and helps students understand the city's importance and connection to American history. Primary source images and supporting text work together to engage young learners from cover to cover.