Norma relacionada
Practice Relating to Rule 7. The Principle of Distinction between Civilian Objects and Military Objectives
Section D. Attacks against places of civilian concentration, including schools
In 2009, the Minister of Foreign and European Affairs of France stated:
[O]ne of the essential principles of international humanitarian law is that a distinction must be made at all times and in all circumstances between … military targets and civilian targets, the latter to be protected. There are few conflicts in which that principle is fully respected.
During the Israeli offensive in Gaza, there were several strikes in areas apparently devoid of any identifiable military target, and in particular that of Dec. 27, which hit the Gaza Training College, and the series of bombardments on Jan. 6 aimed at schools run by UNRWA (the UN Relief and Works Agency for Palestinian Refugees). 
France, Minister of Foreign and European Affairs, “The Savaging of Humanitarian Law”, New York Times, 28 January 2009, pp. 1–2.