Los koalas

Venerado y vilipendiado a un tiempo, Lobachevski se cierne imponente sobre la matemática del siglo XIX. Al igual que sucede a la mayoría de los mitos, el Lobachevski real está oculto por capas de negligencia y desconocimiento. Su fantástica obra, argumentaban muchos, no era otra cosa que herejía matemática, una senda falsa. Lobachevski es una personalidad abrumadora, un soñador empedernido, un hacedor de mundos imposibles pero reales. Lobachevski es, para muchos, una persona desconocida. Este libro cuenta la historia de un hombre sencillo, pero sagaz, obstinado y profundo desde el...

Four alien youngsters make a pizza. They explain the colors of each ingredient they add to it. An alien Mom says they made a good lunch and is happy they took charge of making lunch.

This book tells the story of farmers and life on a farm. What do farmers do? What tools and equipment do they use? Who helps them? Livestock, crops and daily chores are perfectly captured in descriptive photography. With full-color, full-page photographs throughout plus straightforward and engaging text, the I Want to Be ... series is an appealing introduction to a broad spectrum of occupations. The series gives young children a realistic insight into the working day of adults. Easy-to-read captions and color photographs of women and men from different cultures help children understand what's ...

Introduce students to capital resources and how they work as part of our economy. This Spanish-translated text will teach young readers about the economy, while building their literacy skills and social studies content knowledge. Simple informational text features help students navigate the text, while primary source documents and images keep students engaged.