Dinosaurios, garras y crestas

Learn How Dams And Levees Are Built As Well As The Effects They Have On River Systems In A Region, And Places Downstream.

Humans and animals can also make a great team working together. See how horses and the officers who ride them work together to keep our streets safe.

Presents the life story of the Mexican-American labor leader who helped achieve justice for migrant farm workers by creating a union to protect their rights.

SHAAAARRRKK! That's probably the last word anyone wants to hear while swimming in the warm blue sea. But most sharks aren't at all what people expect. In fact, those who think all sharks are giant, man-eating killers are in for a surprise. The compelling narrative, colorful illustrations, and captivating facts in SURPRISING SHARKS reveal that sharks come in all shapes and sizes - and probably should be more afraid of humans than we are of them. Back matter includes a note about sharks and an index.

No longer famous, journalist Cannie Shapiro writes science fiction under a pen name while raising her teenage daughter, and considers her husband Peter's request to have Cannie's flamboyant sister provide surrogate services so that they can have a second child.

MATHEMATICAL WORKSHOP - Offers materials with which the pupil incorporates Mathematics to the knowledge of real life. The game-like character of the activities makes of them a source of interest and pleasure for the students. Conceptual contents, procedural ways and attitudes, attending to diversity; students' evaluation; materials and educational activities are developed.