150 Problemas de Matemáticas para Cuarto de Primaria (Tomo 1)

Read Along or Enhanced eBook: Mysterious events occur all over the world. It rains fish every year in Honduras, rocks in Pennsylvania make music, and large drawings can be found on the desert floors in Peru! In this Spanish-translated nonfiction book, readers will learn about these strange phenomena and more curiosities like ESP and crop circles in this baffling and fascinating nonfiction title. Vibrant images and intriguing facts in conjunction with a glossary of terms, informational text, and an index keep readers captivated from cover to cover!

What are aircraft? -- What do aircraft look like? -- What are aircraft made of? -- How did aircraft look long ago? -- What is an airplane? -- What is a jet? -- What is a helicopter? -- What is a glider? -- Quiz -- Picture glossary.

Celebrating tolerance and acceptance, each title in this constructive and accessible series focuses on the rewards and challenges of having a friend with a disability. Everyday situations are accompanied by informative sidebars that provide details about the highlighted disability.

Rita y Seve, dos niños curiosos que quieren ser científicos, y su mascota el pajarillo Pi te cuentan en este libro todo tipo de secretos para que aprendas mucho sobra el planeta Tierra, el cuerpo humano, el universo, los grandes inventos que ha habido en la Historia (como el televisor o el teléfono), los fenómenos meteorológicos… ¿Sabes… que los delfines tienen una forma peculiar de dormir? cómo se producen los rayos que caen del cielo? cuántos litros de alimentos caben en un estómago normal? cuánta superficie terrestre ocupan los desiertos? a qué saben las nubes? Las...