La vida de Sacagawea (The Life of Sacagawea)

¿Te gustan las búsquedas del tesoro? ¿Cómo sabes si el agua de un arroyo está limpia y saludable? Acompaña a Lucas y a su hermana mientras hacen de científicos en búsqueda de ciertos tipos de insectos de arroyo (macroinvertebrados acuáticos) que necesitan agua limpia y libre de contaminación para sobrevivir. ¿Qué encontrarán al voltear piedras, levantar hojas y buscar entre el lodo? Sigue leyendo para saber si su arroyo recibe una calificación de aprobación.

Colección de 26 cuadernos independientes de los cuatro cursos de Secundaria. Para trabajar y consolidar todos los contenidos de la ESO de acuerdo a las necesidades de cada alumno.

Tailored to the 2013 IB Language B syllabus, our full-colour coursebook, Mañana, contains everything you need to succeed in your two-year Spanish B course. This coursebook prepares students for the 2013 Spanish Language B syllabus (first examination 2015), at both Standard and Higher Level. It is totally international, offering authentic materials from a variety of Spanish-speaking countries. The texts and topics have been chosen because of their intrinsic interest to young people, and to enable students to develop a genuine intercultural understanding. The exercises are carefully designed...

A foundered Victorian ship looking for the fabled Northwest Passage holds a secret in its icy grave... When Dirk Pitt of NUMAr is almost blown to pieces in a lab explosion, he suspects sabotage. The lab in question belongs to a scientist hoping to use a rare mineral to combat greenhouse gases - but who would want to destroy our one chance to save the planet? However, there are those who will do anything to control such a valuable prize. Pitt's investigations take him to the Arctic in search of a clue to the origins of this precious mineral. There he and NUMAr colleague Al Giordino must battle ...