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

The US president is the face of the United States to the rest of the world. However, he or she doesn’t have unlimited power within the country. The president has certain powers given by the Constitution, including the ability to make treaties, appoint some important government officials, and veto laws. Readers learn the many duties of the president in simple, clear language appropriate for both younger readers and older readers looking for a succinct review of the topic. Fact boxes supplement the main content with important details about checks and balances, amendments, and more that affect...

"Once disparatados cuentos narrados en verso. Cautivadores personajes y hermosas ilustraciones acompañan estas historias, donde los chiquitines se encontrarán con niños como ellos, pero también con una bailarina en su pecera, una pequeña gota de lluvia, un sapo salido de un cuento o un perro cazador. ¡En el mundo de todos estos personajes cualquier cosa puede pasar!"--P. [4] of cover.

Follows two children as their family adopts two guinea pigs, offering information on cages, health concerns, handling, behavior, and diet.

Through bright images, charts and graphs, and Spanish-translated informational text, this book provides readers with enlightening facts about what it takes to work in this exciting and unique profession. Featuring a glossary of terms, an index, a list of helpful websites, and an interview with a real-life deep sea fisher, this text will engage children from cover to cover!