Desafíos matemáticos

Sesenta autores, desde catedráticos de universidad hasta estudiantes de Secundaria y Bachillerato, nos presentan los cuarenta desafíos que la Real Sociedad Matemática Española propuso con motivo de su centenario.Son cuarenta estimulantes retos que avivan el ingenio. Enfrentándose a ellos, el lector se sentirá un auténtico investigador matemático.Pero no hay que asustarse. No es necesario saber muchas matemáticas. La herramienta esencial para resolver los desafíos es pensar ordenadamente.

Introduce students to what it takes to be a good leader using this Spanish-translated nonfiction book. Engaging, primary source documents and images that support the text will inspire children to practice being a good leader! Early readers will build their literacy skills and social studies content knowledge while learning about leadership.

These poems speak about the nature of the Chilean countryside, of its animals, its aromas, and its stars. These are verses that invite us to direct our gaze from the Earth to the sky, from the smallest things to the most magnificent. The rhymes and poems compiled in this anthology introduce children to the works of Gabriela Mistral, and allow them to enjoy this poetry that is "infused with heart" by the only female Latin American author to win the Nobel Prize for Literature. Poemas que hablan de la naturaleza propia del paisaje chileno, de sus animales, de sus aromas y de sus astros. Versos...

There is a contest at a school to design a new playground. The students use blocks to build their models. As they build, they use three-dimensional shapes. Some students build a train out of blocks for the younger students to play on. Can you guess which three-dimensional shape they use for the train's wheels? Read to find out which design wins.

Climb aboard for a journey into the world of trains! In this fascinating, Spanish-translated nonfiction title, readers learn about the history of trains, the different uses for them, and the different types and parts including freight cars, box cars, passenger cars, and the caboose. With detailed photos, informative text, and intriguing facts, this book will have readers delighted from cover to cover!