Grupo "Pórtico"

The need for speed is the motivating factor in this engaging, Spanish book. Readers learn the history of travel from the very slow to the supersonic and beyond, including everything in between. They learn and discover the factors that influence motion for all types of vehicles: land, air, and water alike. They also learn different ways to measure speed and read about energy uses for different vehicles. With greater speed comes greater risk. Readers learn how engineers are always seeking new and better ways to keep people safe as they travel faster and go farther.

In 1991, preparation for the construction of a new federal office building led to a startling discovery: a skeleton. Further excavation exposed the bones of 420 men, women, and children. This area of New York had been a burial ground set aside for both free and enslaved Africans during the 1600s and 1700s. It’s thought to be one of the most important archaeological discoveries of the 20th century. This noteworthy book—which includes sidebars, fact boxes, a timeline, and maps—fills in the gaps of history books, exposing much about what life was like in colonial New York for Africans.

Here, the printed music is intended primarily for the teacher who will play through the exercises. The pupil plays from memory rather than from the book.

The dynamic books and accompanying audio CDs in this series introduce babies and young children to popular and traditional Spanish songs and classic folktales. Perfect for native and nonnative Spanish speakers alike, these guides teach basic vocabulary and are a useful and entertaining resource for helping children develop beginning language skills. Los libros y los CDs de audio adjuntos y dinámicos en esta serie introducen a los niños a canciones populares y tradicionales y cuentos folclóricos clásicos en español. Tanto para hispanohablantes como hablantes no nativos, estas guías...