Un día de trabajo de un biólogo molecular (A Day at Work with a Molecular Biologist)

The Underground Railroad was the massive effort by slaves and free people to secretly bring thousands of blacks to freedom in the North during the 19th century. This thought-provoking book will capture readers’ imaginations and fill them with awe for the brave “conductors” and “passengers” on the Railroad. They’ll learn about the many safe havens, called “depots,” that housed fugitives and the secret passages within them that hid slaves from their pursuers. Information about the American Civil War and the Fugitive Slave Act, biographies of figures vital to the Underground Railroad,...

In this Spanish title, learn causes of extinction and what problems extinction causes for animals, wildlife, and humans alike.

Quaderns d'activitats trimestrals per consolidar i ampliar els continguts del llibre de l'alumne Aprenc a escriure en Primària, amb activitats de vocabulari, gramàtica, ortografia i expressió escrita.

An expertly written Spanish B course now updated for first examination 2020, providing students with thought-provoking materials to help them develop strong language skills and solid critical thinking. The coursebook helps students develop their Spanish language skills as they explore the five themes from the new IB Diploma Language B guide: identities, experiences, human ingenuity, social organisation and sharing the planet. Each unit begins with 'big questions' that get learners thinking about global topics such as, 'how do we express our identity?' These help students appreciate wider...