February 20, 2017 0406 GMT
"Attacks on civilian areas continue to kill and injure scores of children in Yemen," said UNICEF's representative in Yemen, Meritxell Relano.
"Instead of learning, children are witnessing death, war and destruction," she added, warning that the actual casualty toll was likely to be much higher than the verified figures, AFP reported.
More than 11,000 people have been killed in Yemen since a Saudi-led coalition launched a military campaign in March 2015.
Relano called on all parties in the conflict to protect children.
The plea follows a Saudi airstrike near a school in northern Yemen on Tuesday that medics and a local official said killed five people, including two children.
UNICEF said that it had confirmed the death of one child in the strike.
"Schools have to be zones of peace at all times, a sanctuary where children can learn, grow, play and be safe," Relano said.
"Children should never risk their lives only to attend school."
She said that nearly 2,000 schools in Yemen can no longer be used because they have been damaged, destroyed or are used as shelters or for military purposes.