A kindergartner, 5, stands with her arms crossed as she waits for classmates to use the restroom before they can return to the classroom, on Aug. 14, 2014, at an elementary school in Beecher, Mich.
Olga Dietz and Glenda McKinney meet with coach Jenna Davis (center) at Mt. View Elementary School in Antioch, Tenn. Dietz and McKinney, teachers of English learners, co-teach kindergarten classes with general education colleagues. Regular coaching is one element of what research has shown makes professional development effective.
