Diana is a dedicated teacher who arrives early on Monday morning to prepare her new classroom for the students. She walks into the bright room and smiles because everything looks clean and tidy. First, she places her lesson plans on the desk near the window. She sits down on her chair for a moment to organize her ideas. Next, she walks to the front of the room and uses a white marker to write the morning greeting on the big whiteboard. She walks past a green bin near the door where students throw away their papers. Diana turns on the modern projector on the ceiling to test the presentation for her geography lesson. She looks at the side wall and checks a colorful science poster and a monthly calendar with the exam dates. Finally, she rolls out a large map of the world so the children can find different countries during the class. However, all that perfect order and peace ends completely the exact second her students come in screaming and running to begin the school day.