¿qué Hace Un Ingeniero?

Juro lealtad a la bandera (I Pledge Allegiance to the Flag) teaches students about the Pledge of Allegiance. This book uses intriguing primary source images and documents and simple sentences to engage students in reading as they build their social studies content knowledge. For use in the classroom or at home, this Spanish book includes a simple glossary, captions and an index to introduce informational text features to young readers and provide additional reading support.

When the Japanese attacked Pearl Harbor in 1941, it prompted the United States to enter World War II on multiple fronts. From Africa to Europe, the Pacific to the home front, explore the American experience of World War II through the first-hand documents of the war.

This illustrated book shows how four lads from Liverpool came to form the most popular musical group ever...the Beatles! It explains the inspiration behind some of their biggest hits and offers insight into important events happening during the time. A timeline and a glossary are included.

Todo fenómeno biológico, como es la sexualidad, se explica por causas próximas (anatomía, fisiología, conducta y su desarrollo) y causas últimas (adaptación y evolución), ambas en interacción con el ambiente natural y social de cada especie, además del sociocultural en los humanos. Específicamente en humanos, muchos especialistas solo tratan de explicar la sexualidad por causas próximas y en términos de conductas conscientes e influidas solo por lo sociocultural, lo cual no es incorrecto, pero ello es solo parte de la explicación, no se acude a las interpretaciones evolutivas....