La historia de los sistemas numéricos: Valor posicional (The History of Number Systems: Place Value)

A selection of dazzling, full-color graphic novels offer an appealing way to deliver social studies content, chronicling the lives of inspiring individuals, from important historical figures to famous musicians.

Isa and Fer find out there's going to be a new baby in the family. Isa is delighted but Fer has mixed feelings.

Un canto a la libertad, el amor y la amistad. Este libro recrea la vida de Hipatia de Alejandría, una figura capital de la antigüedad y protagonista del filme Ágora, de Alejandro Amenábar. Estuvo versada en filosofía, matemáticas y astronomía, pero su clase magistral para la historia fueron su sed de vida y de conocimiento, así como el valor y la entereza para defender sus ideales de convivencia y tolerancia. Hipatia fue un espíritu libre, una voz incómoda a causa de la férrea voluntad de llevar una vida plena como mujer sin pedir perdón por ello, aunque debiera pagar por ello el...

English Spanish bilingual children's book. Perfect for kids studying English or Spanish as their second language. In this insightful children's picture book, you will meet Amanda, a young girl who had a lot to learn about hard work and how to make her dreams a reality. Join Amanda to her wonderful journey, and learn with her how to find your goal and make it come true. You will watch her face challenges but never give up along her path to achieving her goal. "Amanda's Dream" is a motivational book for children and their parents. This is the first book in a collection of short motivational...