Agujeros negros (Black Holes)

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.

First readers will begin to learn and identify shapes, which are the building blocks for learning math.

A tale of the scary fantasies that arise in the darkness, the fear of cruel and wicked beings, and the desire to be protected.

Regina no sabe que un simple contrato cambiará su vida para siempre, y Emma no sabe que ese contrato le traerá aquello con lo que siempre ha soñado

No town or city could be built if the builders didn't understand the concepts of perimeter and area. Students will use perimeter and area to build towns and cities and design homes and parks in the book, Pueblos y ciudades (Towns and Cities). At home or in the classroom, this nonfiction book will engage students in learning measurement and geometry, and how to grid patterns, through fun practice problems and diagrams.