One Friday, Cassandra decides she is going to stay at school. She stays after the nice teacher leaves. She stays while the janitor with a tattoo mops the floors. She stays after the mean principal turns off all the lights and goes home. The following day, Cassandra gets up and puts her school clothes on. Her parents explain that It's Saturday and there is no school on Saturday. Thankfully Cassandra has an idea that might just bring the school environment to her home. PreK- Grade 3. Paperback.