¿Qué hace a una familia?

The Earth is made up of shapes. The shapes make up landforms. Find out about all of Earth’s landforms. Paired to the fiction title A Long Car Ride.

Animals have families, too. They have a mom and a dad. Each family member has a role. Find out about animal families. Paired to the fiction title A Trip to Grandma’s House.

Snow falls when it is cold. Find out all the different ways snow can fall during cold weather. Paired to the fiction title Building a Snowman.

These high-interest, low reading level biographies chronicle the lives of inspiring individuals and use a vivid, graphic-novel format that will capture the attention of reluctant readers. The dazzling, full-color illustrations and easy-to-read text bring each person's life and times to life.

Mammals are a very diverse group. From whales and dolphins that give birth in the water to platypuses that lay eggs, these life cycles can often seem very different. However, they’re very similar. Readers learn the basic structure of the mammal life cycle through simple language and accompanying diagrams that show the cycle step by step. The main content offers a way for struggling readers to more easily learn an important science curriculum topic, but can also be a great review tool for any reader.

Discusses the various facets of the fall season, including activities and celebrations, through simple questions and answers.

La historia de la ciencia en la Edad Media es, hasta el siglo X, la del mantenimiento precario de los escasos saberes de la Antigüedad clásica que habían sobrevivido en occidente. A partir de entonces, la traducción del árabe de las obras de autores griegos fue la tarea fundamental. En el siglo XIII aparecen los primeros matemáticos medievales realmente creadores - Fibonacci, Jordano Nemorario y Nicolás de Oresme, entre otros. Al estudio de la obra de estos científicos y la de sus precursores está dedicado este libro.