There are many different systems for the levels of education around the world. Usually, it is possible to follow the system of the country where the language spoken is the native one. I could say for example "I'm studying at the Swedish equivalent of high scool", or if I'm lazy I could just say "high school". For reasons known to you all, this isn't possible in Esperanto.
Please correct me if I'm wrong, but education usually begins with vartejo and ends with universitato. The problem is what comes in between. I have seen all these words: bazlernejo, mezlernejo, liceo, gimnazio, altlernejo, duagrada lernejo, unuagrada lernejo. What is the order of them? Which ones should I use to be understood?