If you can "do the math" and compare the cost of photocopying the textbook page by page with ordering textbooks enough for the class. You might look at local products to save some on shipping. It may well be that the school would save money by getting the texts. I expect your principal would be responsive to saving money along with achievement.

Some places are replacing a huge textbook with study lessons as used in Japan or Singapore Math--a few math problems deeply studied by students and discussed in depth with the various solutions and strategies the students use to solve them. Might this be part of the reason behind the lack of texts?

Here is a reference for some articles introducing Singapore Math (lots of worksheets on line if you search engine it) and Japanese Math Study

http://www.thedailyriff.com/articles...should-198.php
While not a complete math program, I'm referencing some supplements, below that might help keep you going while you work on getting the books.

For some additional support for math, I really like Marilyn Burns' stuff at Math Solutions. Here is the URL for some free lessons from her materials

http://www.mathsolutions.com/index.c...e=wp9&crid=122 I hope it comes through.

KenKen puzzles from the NYTimes might be fun for your students

http://www.nytimes.com/ref/crosswords/kenken.html
Hope this helps a bit. I'm sorry you were misled about your teaching situation abroad. I hope you are able to have some fine experiences there, anyway.