Matemáticas en Marte (Math on Mars)

The asteroid belt between Mars and Jupiter is an intriguing area of our solar system. Scientists have counted over 670,000 known asteroids there, but there could be millions more not yet found. Readers will discover much more about the asteroid belt in this highinterest book, which blends science and math. They'll read about several topics, such as space missions to the asteroid belt and the difference between an asteroid and a planet, and solve associated math problems-just like actual space scientists do!

Carmelio the kangaroo, about to leave his mother's pouch for the first time, has two special surprises waiting for him.

The use of calendars dates back thousands of years. Why are we driven to record time, and what would happen if we did not? Who created the concept of calendars? Why do different cultures use different calendar systems? And why are calendars so important to us? It is about "time" we found out! Created in collaboration with the Smithsonian Institution, this Spanish-translated Smithsonian Informational Text builds reading skills while engaging students' curiosity about STEAM topics through real-world examples. Packed with factoids and informative sidebars, it features a hands-on STEAM challenge...

Todavía hoy existe una clara reticencia, por parte de muchos estudiosos, a reconocer el importante papel que las mujeres han jugado en el desarrollo del género fantástico y de terror, bien como lectoras o como creadoras, ignorando la larga tradición de escritoras especializadas en esta narrativa, particularmente en la cultura anglosajona. Aunque fueron dos hombres, Horace Walpole (1717-1797) y Matthew Gregory Lewis (1775-1818) quienes «inventaron» la ficción gótica con sus clásicas historias El castillo de Otranto y El monje –números 10 y 3 de la colección Gótica–, el género...

800x600 Boys can be anything they want to be! This timely book joins and expands the gender-role conversation and gives middle-grade boys a welcome alternative message: that masculinity can mean many things. You won't find any stories of slaying dragons or saving princesses here. In Stories for Boys Who Dare to Be Different, author Ben Brooks-with the help of Quinton Wintor's striking full-color illustrations-offers a welcome alternative narrative: one that celebrates introverts and innovators, sensitivity and resilience, individuality and expression. It's an accessible compilation of 75...