Lewis y Clark y la compra de la Luisiana (Lewis and Clark and Exploring the Louisiana Purchase)

Mediante la técnica del flash-back el autor nos cuenta dos historias paralelas separadas por miles de años de diferencia pero con un punto en común: las pinturas rupestres de Altamira.

Take a look inside this book and you'll discover four delightful jigsaws specially designed for tiny hands, with each jigsaw piece that has touchy-feely textures that will help to develop sensory awareness and the concept of matching.

Each player has his or her own job in soccer and baseball. They each do their part to contribute to the team. Teamwork is also important outside of sports. We use teamwork in our classroom, in our community, and at home with our family. Readers are presented with different scenarios in which young people use teamwork to achieve a certain goal, like when Nicole's neighbor becomes ill, everyone in the neighborhood takes on a job with the goal of helping the sick neighbor. Each spread contains a color photograph that imparts the importance and rewards of working as a team.

This book gives students an in-depth look at how large telescopes work. The wonder and awe of space and the scientific instruments we use to study it both come shining through in this fascinating book. Full-color diagrams and illustrations will help students visualize how the technology of telescopes works. Students will learn about the creation of mirrors 8 meters wide and telescope teams that work together to create a telescope as powerful as if it had a mirror the size of the Earth!