Erin Day 
Subir y bajar en la clase de gimnasia (Up and Down in Gym Class) [PDF ebook] 

Up, down, and all around. This fun book will make children excited to get moving and learn about opposites. A relatable narrator and the familiar location of a school gym class will help readers and listeners connect with the text and apply what they learn to their everyday lives. Bright illustrations paired with age-appropriate text help children develop reading comprehension skills. Featuring familiar activities, from rope climbing to jumping on a trampoline, this book is sure to be a hit.