Californianos que marcaron la diferencia (Californians Who Made a Difference)

La contaminación del medio es, sin lugar a dudas, una preocupación de quienes habitamos este planeta, aunque con frecuencia no sepamos lo que opinan los divulgadores de la ecología. Planeta azul, planeta gris ofrece, a través de un relato ágil que se desarrolla en una escuela preparatoria o de educación media superior, las diversas formas de contaminación que afectan nuestro entorno. Mónica Lavín Maroto es una destacada escritora. Estudió la carrera de biología en la Universidad Autónoma Metropolitana-Xochimilco y trabajó en el Instituto de Ecología. Ha sido colaboradora de las...

Practice addition at the playground! This fun title, that has been translated into Spanish, uses examples from all around the playground to help children practice their addition and understand early STEM themes. Add up two blue swings and three red swings to get five swings! Add slides, rings, jump ropes, basketballs, and more! These familiar images work in conjunction with engaging "You Try It!" problems to encourage young readers to practice and improve their addition skills.

By day, Zoe Zhang is a fourth-grade bunny who loves reading books and playing soccer. By night, she's Robin Hoodie, a hero bandit who steals from the greedy and gives to the poor. When a dishonest city official bullies her family, she and her band of Merry Mates fight back. Kids will be captivated by this fast-paced adventure story that will appeal to reluctant readers. This short, 32-page chapter book features colorful, lively illustrations to capture the attention of kids who enjoy stories about underdog superheroes.

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...