I'm sorry if I've been a bit snippy to the teachers here, but there is a reason I'm still a bit angry.
In January, 2008 I took my DGD to WDW for her 9th birthday. Her mother cleared it with the principal at the begining of the year, but her teacher was not happy about it. At the end of the school day, the day before we left, she gave my DGD a huge packet with several dozen exercises in it & told her (and her mother) that it had to be done by the time she got back. This was what she would be missing - and if she didn't complete it all, she would be behind.
We spent 1 to 2 hours on it every night, and barely made a dent. It was a complete mess. There were questions on readings that weren't included (and not in the text books - we brought them all with us) - and no indication what they were to. There was a cross-word puzzle that was missing all the Across questions (the second page). Pages missing from exercises (on several it was the first page - with the instructions). Some were so poorly copied, you couldn't read them. It was a big mess.
She had one day between the time we got back & school (the MLK Jr holiday). Her adult half-sister sat down with her and they worked for 12 hours to finish the assignments.
And when she went back to school the next day, her teacher told her she didn't need to collect it just then. Eventually, TWO of the assignments were given to her class - about a month or so later. The rest were never assigned (and her mother found out that most of them were years old, and the readings were from books they didn't use anymore).
Basically, her teacher decided to punish her. To teach her a lesson about how HER CLASS was too important to miss. I'm sure she thought she was totally justified. I don't happen to agree.