Arboles de globos / Balloon Trees

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.

Andrés está harto del colegio, de los granos, del rollo de su madre, de la plasta de su hermana, de Jorge el "birlanovias", de la vida en general y del profesor de historia en particular. Dani y él se han propuesto cambiar el mundo y hacen un conjuro que les hará inmunes a las fantasmadas de pijos, pelotas y demás aves carroñeras y los convertirá en héroes. Bueno, al menos eso es lo que estaba previsto. Si luego las cosas se tuercen...

Learn about the Victorian era while building your knowledge of equivalent fractions! Students will learn fractions while engaged in reading about the innovations of the Victorian era. This Spanish book combines mathematics and literacy skills, and uses practical, real-world examples of problem solving to teach math and language arts content. The glossary, index, and table of contents will further understanding of reading and math concepts, and the full-color images, practice problems, and math graphs and charts make learning math easy, practical, and fun. The Explore Math sidebars and Math...

Our closest solar system is about 10 light years away. It has two main types of planets. Some are rocky and small, like planet Earth, while others are huge balls of gas, like Jupiter. Learn about how astronomers once thought our solar system was the one and only, to how they have now discovered hundreds of stars with planets orbiting them, which means there could be billions of solar systems in outer space! Just maybe, these alien worlds could host life, like our own amazing planet. This book allows students to use observations of the Sun, moon, and stars to describe patterns that can be...