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

En el año 1630, la caza de brujas siembra el pánico en toda Europa. Mujeres y hasta familias enteras son víctimas de la inquisición. En un pueblo de Alemania comienzan a surgir rumores acerca de Nina y sus visiones premonitorias. Al ser las amenazas cada vez más siniestras, Nina abandona la casa de sus tíos portando el amuleto de su madre, a la que quemaron por bruja tiempo atrás. Ese amuleto la orientará en todo su camino.

Although John Pentecost left the place and married Katherine, he feels very attached to his hometown in Lancashire, a beautiful place that harbors uncomfortable memories. But when John's grandfather dies, John will be forced to return home, where he will have to face decisions and sacrifices for the clan.

In English and Spanish, build empathy in children; guide them to show they care by listening to others and respecting their feelings. Empathy is key to positive, healthy relationships. In clear, child-friendly words and illustrations, this English-Spanish bilingual book helps children understand that other people have feelings like theirs—and different from theirs. It guides children to show they care by listening to others and respecting their feelings. Includes questions to discuss and empathy games to play, in both English and Spanish. ​The Learning to Get Along® Series The Learning...

Algorithms might sound like a complicated tech term, but don't be intimidated, people actually use them every day. Using accessible language and full-color photographs, this book simplifies algorithms in an easy-to-understand way. Readers will be amazed to learn that an algorithm is just a set of steps for computers to follow to get things done. STEM topics from the Next Generation Science Standards are emphasized throughout the text. Sidebars featuring key terms help readers grow their tech vocabulary, and fact boxes provide additional opportunities to learn.