Días de Descubrimiento (Discovery Days) ¿Quién cuenta?

People have been sending mail for a long time. But how they do it has changed a lot! Read about the history of mail as you learn to collect data. This Spanish math book combines math and reading skills and uses real-life examples of problem solving to teach subject-area content. The dynamic images, detailed sidebars, practice problems, and math diagrams make learning data measurement easy and fun. Text features include a table of contents, a glossary, an index, and captions to build vocabulary and increase understanding of math and reading concepts. An in-depth problem-solving section...

Summarizes how water changes from a solid to a liquid and back again, and introduces related facts such as that water freezes at thirty-two degrees Fahrenheit and that ice floats.

Julia nunca hubiera imaginado que podría vivir tantas aventuras aislada en una habitación de hospital. ¡Ni que aprendería tantas cosas! Y todo gracias a su amigo Bruno, a su abuelo y, sobre todo, a un personaje muy especial que resultará ser una auténtica autoridad en el mundo de los sueños. Una historia tierna y emocionante.

Introduces Iran, including the geography, people, education, rural and urban life, housing, food, work, and amusements, along with other information about the country.