My 4 year old is in Reception. She has been having some massive sleep issues this week since her dad left for a month long work trip. She's been waking up around midnight and then not going back to sleep. Right now it's 2am and she has been up since 10, having gone to bed at 7:30. She is saying she's not tired and cannot sleep. I have kept lights low, no tv or screens, and nothing exciting. But she won't sleep. I don't know how I can possibly send her to school tomorrow on such little sleep. She will be dozing off and such a tired mess. Is it acceptable to keep my child home from school for not having slept at all the night before? I just don't know what to do.