I got a frantic call at work today from a teacher. Being she wasn't going to be at school tomorrow, so she was removing the turner today. She was checking to made sure the temp was right before leaving for the day. Well, she saw one of the eggs moving and then another. Day 21 is Monday afternoon, but by tomorrow afternoon there will be at least 2 chicks. You can never tell, some early, some late. The children will get a real surprise in the morning.