Earth Science Teacher Megan Greenwood talks to her students about the different layers of the earth's core Tuesday, Oct. 9, 2018, at Twin Falls High School in Twin Falls, Idaho. Greenwood, a first-year Earth science and freshman transitions teacher, is under alternate authorization, meaning she doesn’t yet have a teaching credential. She’s one of many teachers in south-central Idaho working under alternate authorization, as the region has been hit the hardest by a statewide teacher shortage. NOTE: As a photographer, there are certain things we look for that draw the focus to our subject. Leading lines, shapes such as triangles, and bright spots all grab the attention of the eye. If you look, this image utilizes all three of those techniques to ensure your focus is locked directly on the teacher.