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The word 'istruzione' in Italian is used to refer to a set of directions or guidelines given to someone in order to complete a task or achieve a specific goal. It can also refer to education or training, as in 'istruzione scolastica' or 'istruzione professionale'. In a broader sense, it can refer to the process of teaching or learning, as in 'dare istruzioni' or 'ricevere istruzioni'.
Public education is free in Italy.
This sentence informs about the policy of public education in Italy. It's a factual statement implying that public schools in Italy are state-funded and there are no tuition fees for students.
I received a great education.
This sentence suggests that the speaker has benefitted from a high-quality education. The use of 'great' suggests a positive evaluation of the education received.