Karolinka,
maybe its worth checking with the (obviously not poor) parents of your students if they are keen to increase their tax bill from 10% to say 25% in order to:
1. Install competent people at the Ministry of Education
2. Start a meaningful (and always costly) education reform
3. ONLY THEN raise teachers' pay, linking it to performance
All good state school systems cost A LOT of money and are funded by the taxpayer. Its worth considering if places like ACS are maybe the epicentre of the Bulgarian educational divide, where everybody who can afford the money sends their kids to private schools. At the same time if you ask the those parents about taxes – all say they pay too much and get nothing in return.
Sounds like Paul Ryan and the Tea Party will easily get 80% of the posh Sofia suburbs.