This question may seem easy to answer. But in fact, it is not!
Let yourselves think of the ways you have to claim a right and demand its application as an adult. Let us take the following example: the Ministry of Education has illegally sanctioned one social media post of yours where you denounce your country’s aggressions that led to a great war with a neighbouring country 100 years ago and you also mention that schoolbooks do not tell the truth. The Ministry fines you and makes a cut from this month’s salary. The Ministry has violated your right to express your opinion.
Let us now imagine that something similar has happened to a student. He posts a similar post mentioning that at their schoolteachers are very ethnocentric and do not permit deviation from the official interpretation of historical facts. The Ministry asks the head of school to punish the student with a 1-week expulsion. The Ministry violates the freedom of speech of the child.