El ferrocarril transcontinental (The Transcontinental Railroad)

This book is a comprehensive, practical presentation of the principles of behavior modification and guidelines for their application. It teaches forms of behavior modification ranging from helping children learn necessary life skills to training pets, to solving personal behavior problems.

¿Piensas que la filosofía es algo anticuado, abstracto y aburrido? Este libro te demostrará que te equivocas. A través de las historias de 100 filósofos y pensadores de todas las épocas y lugares, descubrirás que la filosofía está más viva que nunca. Junto a Sócrates, Hipatia, Kant y Voltaire, aprenderás a reflexionar sobre diferentes temas, desde los fenómenos de la naturaleza hasta el ser humano, desde el lenguaje hasta el amor, incluso sobre la existencia de Dios. Una historia para cada día, que comienza con preguntas y curiosidades sobre la vida diaria, que estimularán y...

The moon people, Kaluma, Aluma, and others use a cloud bridge to travel to the Earth, a messy but beautiful world of incredible variety that becomes their new home.

Born into slavery, Frederick Douglass relied on his own determination and ingenuity to carve a path to freedom. Once free, he dedicated his life to improving the lives of others and fighting for justice and equality. This inspirational Spanish biography uses primary sources to engage students in learning about the fascinating life of Frederick Douglass. Students will build their literacy skills as they are immersed in social studies content. Text features include a glossary and an index to increase comprehension and academic vocabulary.