¿Por qué celebramos el Día de Martin Luther King Jr.? (Why Do We Celebrate Martin Luther King Jr. Day?)

Over the years, people have looked for ways to improve our imperfect sight. This has led us to the world of optics, which is the study of light and how it travels. What are some of these innovations that have changed how we see the world, and how do they work? Find the answers to these questions with this Smithsonian Informational Text! Created in collaboration with the Smithsonian Institution, this text builds students' reading skills while engaging their curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides students through every step...

Today is Mauro's Birthday. Everything is ready for the celebration; his friends have a lot of presents for him.

�Cu�les son algunas de las cosas que nosotros podemos aprender sobre los animales tomando en cuenta la forma de sus bocas o picos? �Qu� podemos deducir sobre los animales con dientes filosos comparados con los que tienen dientes largos y planos? �Existen algunos animales sin bocas? En esta secuela sobre las series de Adaptaciones de animales, la galardonada fot�grafa y educadora naturalista Mary Holland comparte las fascinantes bocas de los animales con los lectores de todas las edades.

An informative guide to the National Museum of Fine Arts in Buenos Aires features a photograph gallery, information about different art styles, and a map of the Museum.