Experimentos sorprendentes con la luz

Internet security breaches have been in the news of late. Organizations, governments, businesses, and individual internet users are all at risk. This book introduces readers to the importance of cybersecurity and addresses the current risks from hackers, viruses and other malware, identity thieves, and other online perils. It provides concrete measures that young digital natives can take to protect themselves and their computers, smartphones, and other devices. This volume's lively, cautionary narrative and useful tips will help readers effectively defend their identities and data.

This is a story of three characters--Noah, Joyce, and the anonymous narrator--as each leave their far-flung birthplaces to follow their own personal songs of migration. All three end up in Montreal, each on his or her voyage of selfdiscovery, each compelled to deal with the mishaps of heartbreak and the twisted branches of their shared family tree. Filled with humor, charm, and marvelous storytelling, this novel links cartography, garbage-obsessed archeologists, pirates past and present, a mysterious book with no cover, and a broken compass whose needle obstinately points to the Aleutian...

How do you truly engage students in learning history? When students make personal connections to the subject, they’re much more motivated to learn. This Spanish book provides firsthand accounts of history that give personal insights into historical events. Students will learn about California’s gold rush by examining maps, letters, images, and art from that time. With a visually appealing layout, this book features captivating text, fun facts, sidebars, and time lines that help students grasp the essential concepts they need to know at their grade level. Packed with information and primary...

Ganador del premio Pura Belpré de ilustración De niña, a Teresa Carreño le encantaba dejar que sus manos bailaran a lo largo de las hermosas teclas del piano. Si se sentía triste, la música le levantaba el ánimo y, cuando estaba feliz, el piano la ayudaba a compartir esa alegría. Pronto comenzó a escribir sus propias canciones y a tocar en grandes catedrales. Entonces, una revolución en Venezuela hizo que su familia tuviera que huir a Estados Unidos. Teresa se sentía sola en este sitio desconocido en el que muy poca de la gente a quien conocía hablaba español. Y lo peor es que...