These NSTA standards linked, leveled readers are 24 pages with fabulous photography tied to text. They include before and after reading activities, word counts, and sight word lists. 8" x 8". Grades K-1 (Reading Levels C-E)- Includes: Apple Trees and the Seasons; How Do Plants Grow?; Science Safety Rules; Who Do I Look Like?; I Use Simple Machines; Our Sun Brings Life; Run, Swim, Fly; Solid or Liquid?; Stop and Go,Fast and Slow; Day and Night; I Use Science Tools; What Is It Made Of? 12 BOOKS PER SET.