Joaquín Murrieta

El Proyecto Aristóteles es un centro de creación de materiales didácticos en áreas fundamentales de la educación. Este libro es el Tomo I de la Colección de Problemas de Matemáticas para 4º de Primaria, organizada en progresión de dificultad. En él encontrarás 150 problemas de multiplicaciones, divisiones, fracciones, magnitudes, etc., con los que poner a prueba los conocimientos matemáticos de los niños de esta edad.

Deforestation, hunting and global warming have endangered countless species. The orangutan, okapi, giant panda and the blue whale are just some of the 30 species on the brink of extinction that are featured in this book. They need your help. The International Conservation Society illustrates how many of these species are left in the wild, and the latest status regarding their natural environment. You'll learn how you can aid endangered species and help sustain the ecosystems that give them life.

How much life can one cubic foot hold? Read how photographer David Liittschwager and zoologist Chris Meyer studied life in one cubic foot, and how their findings can teach us about life on the entire planet. Created in collaboration with the Smithsonian Institution, this Spanish 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 that is perfect for use in a makerspace and teaches students every step of the engineering design process....

Describes where fossil fuels come from, their uses and forms, the harm they cause to the environment, and sources of renewable energy.