En el trabajo: Contratistas: Perímetro y área (On the Job: Contractors: Perimeter and Area)

The Grand Canyon is a "grand" place to learn data analysis! Through an examination of its rocks and fossils, students will learn data analysis while reading about a fun-filled trip to Grand Canyon National Park. This Spanish book uses real-world examples to teach math concepts, and incorporates nonfiction reading to increase vocabulary and comprehension skills. The challenging practice problems, graphs, and sidebars provide many opportunities for students to practice their developing math skills, and apply what they've learned to their daily lives. Essential text features like a glossary,...

¿Sabías que la forma tubular del submarino lo ayuda a moverse más rápido por el agua? Los tanques de lastre lo ayudan a hundirse o flotar. Aprende más datos fascinantes en Los submarinos, uno de los libros de Máquinas militares poderosas.

One of the most popular narrators of his time, Arthur Conan Doyle, was a visionary man with attitudes which were far ahead of his time. In this book we will know in depth his biography, his work, beyond the creation of the illustrious Sherlock Holmes, and his spiritualistic inquisitiveness.

Fruits and vegetables both come from plants. Fruits have seeds. Vegetables do not. Let’s learn more about fruits and vegetables. Paired to the fiction title Planting Seeds.

Rusbashov, miembro de la vieja guardia bolchevique y héroe de la Revolución Soviética, ha sido encarcelado acusado de traición al gobiernode Moscú. Es incitado a autoinculparse de una serie de delitos y traiciones que no ha cometido, pero termina por confesar a fin de salvar la Revolución. Esta obra cumbre de la literatura política nos ofrece un testimonio excepcional de la angustia que sufrieron cientos de antiguos miembros del Partido que desaparecieron, fueron encarcelados y juzgados o llegaron a autoinmolarse para salvarlo