National Geographic Readers: Los Gatos vs. Los Perros (Cats vs. Dogs)

A scientific look at the natural processes that create waterfalls, and where they are likely to form.

The use of calendars dates back thousands of years. Why are we driven to record time, and what would happen if we did not? Who created the concept of calendars? Why do different cultures use different calendar systems? And why are calendars so important to us? It is about "time" we found out! Created in collaboration with the Smithsonian Institution, this Spanish-translated Smithsonian Informational Text builds reading skills while engaging students' curiosity about STEAM topics through real-world examples. Packed with factoids and informative sidebars, it features a hands-on STEAM challenge...

Desde que el ser humano es tal, ha admirado, temido, incluso venerado a los animales. Esto tiene una explicacion: son una pieza clave en nuestra subsistencia como especie. Con excelentes fotografias e ilustraciones, el presente libro narra como nos hemos relacionado con los animales a traves de los siglos en los diferentes lugares del mundo. Book jacket.

Making a decision can sometimes be tough. Consider how difficult it is for people to make decisions as a group. It definitely is a skill that must be learned and exercised. This book uses age-appropriate text to explore how leadership and communication can help groups, from students to politicians, make decisions. The text also offers insight on how to deal with people in groups who aren't positively contributing to the decision-making process. Readers will enjoy learning about working with others to make decisions and other valuable civics concepts from the C3 Framework for Social Studies.