The Math Teacher

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...

"Dino" Don Lessom brings readers face-to-face with various dinosaurs, detailing how they lived, raised their young, and became extinct. Maps, timelines, and colorful illustrations and photographs will capture kids' attention. A dinosaur expert, Don Lessem has written more than 30 children's books.

Mysterious ancient ruins, hidden deep in the jungle of southern Mexico In May 1840, explorers John Stephens and Frederick Catherwood road their mules along a steep, muddy jungle path. They were hoping to find the ruins of an ancient, deserted site in Mexico they knew only from visitors’ accounts. Through the trees, they spied the remains of a crumbling stone palace. Palenque! In the weeks they spent there, the men discovered intricately designed buildings and mysterious glyphs, or symbols. Who built this city? What did the glyphs mean? The questions remained largely unanswered until the...

La Santísima y Vera Cruz de Caravaca fue robada misteriosamente durante las fiestas de Carnaval de 1934 y hasta ahora nadie ha podido averiguar su paradero. Sus oscuros y discutidos orígenes y su extraña desaparición llenan su historia de enigmas sin resolver. Esta novela, a medias policiaca y a medias histórica, nos lo muestra con las aventuras de un caballero templario del siglo XIII y un inspector de policía del siglo XX, unidos por los misterios de la Cruz de Caravaca en los tiempos turbulentos de nuestra Guerra Civil de 1936 - 1939. La intención del autor al escribir esta...