As for people complaining about the length of holidays. YOU WORK IN A SCHOOL!!! How are you supposed to teach students when they are at home. "But they didn't tell us that the holidays were so long" yeah, and you didn't think about it. They told you you would go to a school. Just get a part time job through the summer. It's only 2 months during the summer. "Yeah but winter and summer combined is 4 months!" Yeah but to work both summer and winter you would have to work for more than 1 year. That means you signed another contract. Why do that if the company is so crappy? Choose where you want to work just be realistic and remember your in China.

Here we have another wumao with the 'remember your in China' business, not only that an hilarious grammar mistake, but he is following the traditional tactic of discrediting the poster and implying that they weren't cut out for China...

Well, if you are going to hire some fresh off the boat newbie... Did the HR not ask them suitable questions about multi-cultural adaptability or knowledge during the original job interview? Do you not provide training or support for employees?

Some strange stuff about holidays there, confusing to say the least... Universities have very long PAID vacations. OK, contracts are usually 10 months these days...

Even at the shittiest of TCs, you are not paid by the hour, unless you work part time; which is technically illegal, so we have you encouraging illegal behaviour.
In fact, most TCs, whilst not following public school/universities schedules for practical reasons, will actually get more business during those school/university holidays. Most TCs will actually despite the lack of the long summer/winter vacation, at least follow general Chinese employment law and give you all public holidays off or a standard rate of overtime pay (usually triple). Most have the sense not to remain open on such days as they get no customers coming to class anyway.