Cómo ser adolescente y ser felíz en el intento

Muddy Creek in Edgewater, Maryland is the site of a major makeover. The land around the stream has worn down. Find out what caused Muddy Creek to erode, and the many steps involved in saving it. Created in collaboration with the Smithsonian Institution, this Smithsonian Informational Text builds students' reading skills while engaging their curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides students through every step of the engineering design process and is perfect for makerspace activities. It makes STEAM career connections by...

A 2014 survey by the Substance Abuse and Mental Health Services Administration showed that 8.7 million youths ages twelve to twenty reported drinking alcohol beyond “just a few sips” in the previous month. Those who start drinking before age fifteen are five times more likely to become dependent on alcohol than those who begin at twenty-one. This resource shows young people how to help a friend who is abusing alcohol. It arms them with facts about alcohol, how it affects the teen mind and body, how to look for signs of a problem, and how to bring others on board to help.

¿Está prevista una misión humana a Marte? ¿Cómo se captura un cometa? ¿Cómo es el centro de la Tierra? ¿Existen los extraterrestres? ¿Es posible enseñar a nuestro cuerpo a curar las heridas? ¿Conseguiremos viajar en el tiempo? ¿De qué está hecho el Universo? ¿Cómo serán los videojuegos del futuro? ¿Seremos los seres humanos sustituidos por robots? ¿Cuáles son los descubrimientos científicos que cambiarán nuestras vidas en el próximo medio siglo? En este libro encontrarás algunas preguntas que te has hecho sobre el futuro y sus respuestas; con él, entenderemos mejor el ...

California became a territory in the United States when the Treaty of Guadalupe Hidalgo was signed in 1848. That treaty ended the Mexican War. Several days before its signing, gold was discovered at Sutter’s Mill in what is now Sacramento. The non-Native population of the territory was less than one thousand in 1848, but the gold rush increased that number to one hundred thousand by the end of 1849. The gold rush not only made many people wealthy, it brought ecologic devastation while speeding up California’s statehood. This book richly explores this interesting history.