There is less choice for English-language schools in Sofia than for kindergartens and the choice becomes even narrower above the age of 14. There are now two fully English-speaking highschools offering the IB programme to expat children. Local private schools are also an option, though at least part of their curriculum is usually taught in Bulgaria, which may be a problem. 

Uwekind, a bilingual German-Bulgarian school has recently been awarded the license to teach IB and has also introduced English as a third language.