In the US we've got 12 levels (years) of primary and secondary education, followed by 'higher' education. Here at least I suppose you could call a bachelor's something like "16th grade", or "Level 16". Different Masters and PhDs require different numbers of years, though, so it's not a great system.

How about something like "Practitioner" instead of Bachelors, "Expert" instead of Masters, and stick with Doctorate for the PhD?