¿Por qué hibernan los animales? (Why Animals Hibernate)

When rocks change because of environmental conditions, the new rocks are called metamorphic rocks. A rock's chemical or physical makeup may change because of conditions such as temperature, stress, or pressure. Your readers will learn fascinating facts including where metamorphic rocks are most commonly found, the different types of metamorphism, and how metamorphic rocks are identified. Full-color photographs depict these rocks in nature. A helpful graphic organizer shows how these fascinating rocks form.

The rock cycle has been taking place for millions of years. However, geologists have only known about this phenomenon for about 300 years. Young terrestrial explorers are introduced to different types of rocks, where in the cycle these rocks fit, and where in Earth's layers each step takes place. Fact boxes provide readers with fun additional information. A diagram helps readers make sense of the new information they're learning.

Although Earth is mostly made up of igneous and metamorphic rock, sedimentary rock covers about 75 percent of Earth's land surface. This means it's the most visible kind of rock on Earth. Sedimentary rocks form when sediment accumulates and compacts. Your readers will learn how sedimentary rocks form, the different types of sedimentary rocks, and how people use sedimentary rocks. Fun fact boxes provide readers with additional information. A helpful diagram illustrates how sedimentary rocks form.

¡Feliz Cinco de Mayo! Esta fiesta anual comenzó después de la histórica victoria del ejército mexicano y ahora se celebra en muchas partes de los Estados Unidos. Aprende acerca de la comida, música y mucho más a través de fotografias llenas de color, diagramas y otros elementos de textos informativos. Las preguntas de pensamiento crítico a nivel apropiado ayudan a los lectores a ahondar en la información y comprender lo que hace única a esta celebración. ¡Feliz Cinco de Mayo! This annual fiesta began after a historical Mexican military victory, and now it is celebrated in many...

It’s fiesta time! Cinco de Mayo is a fiesta day in Mexico and the United States. It’s celebrated on the fifth of May. This colorful holiday honors Mexico’s victory over the French army at the Battle of Pueblo in 1862. People march in parades, dance, and set off fireworks. Families enjoy traditional Mexican food and drink. Then they watch people act out the famous battle. Find out more about this joyful celebration of Mexican culture.

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.

Una traición y dos guerras devastaron su pasado, una identidad encubierta la precipitó al futuro. La joven modista Sira Quiroga abandona Madrid en los meses previos al alzamiento, arrastrada por el amor desbocado hacia un hombre a quien apenas conoce. Juntos se instalan en Tánger, una ciudad mundana, exótica y vibrante donde todo lo impensable puede hacerse realidad. Incluso, la traición y el abandono. Sola y acuciada por deudas ajenas, Sira se traslada a Tetuán, la capital del Protectorado español en Marruecos. Con argucias inconfesables y ayudada por amistades de reputación dudosa,...