Alexander Hamilton

Did you know that the first wheel was not invented for transportation or that the system used to create computers was based on the functionality of a sewing machine? In a fun way, this book teaches the history behind inventions that have changed the way we live, from Ancient Mesopotamia to the present. Important details appear at the bottom of each page, including the name of the inventor, the time period, and the place where it occurred.

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.

Focuses on NSTA Standards of understanding science and technology. Explores the position of motion of objects.

Un grupo de cazadores mata a un oso en los bosques cercanos a Kiruna. Cuando abren el vientre del animal, encuentran un dedo humano entre las vísceras. Unos meses más tarde, hallan a una mujer asesinada en su casa. Ha sido brutalmente agredida con una horqueta hasta la muerte. Markus, su nieto de siete años, ha desaparecido. La fiscal del distrito, Rebecka Martinsson, que en un principio se iba a hacer cargo de la investigación, es retirada del caso. Por su cuenta y riesgo empieza a indagar en el asesinato de la mujer: la muerte parece perseguir a esta familia, y Rebecka no está...