http://general-terms.thesaurus.ekt.gr/vocabhttp://general-terms.thesaurus.ekt.gr/vocab?tema=9304secondary education http://general-terms.thesaurus.ekt.gr/vocab?tema=9304 compulsory education BT http://general-terms.thesaurus.ekt.gr/vocab?tema=9304 senior high schools RT http://general-terms.thesaurus.ekt.gr/vocab?tema=9304 private education RT http://general-terms.thesaurus.ekt.gr/vocab?tema=9304 public education RT http://general-terms.thesaurus.ekt.gr/vocab?tema=9304 education BT