[1/2] People walk down a street near anti-tank constructions as Russia's invasion of Ukraine continues, in central Kyiv, Ukraine February 8, 2023.
To avoid the lesson being disrupted by yet another Russian attack, she had quickly moved her class underground when the air-raid sirens sounded.
"We teach math, biology, chemistry - everything according to the usual schedule," Olena, who declined to give her last name, told Reuters.
Nearly a year after it began, Russia's invasion has upended life but also rallied a nation.
Russia denies targeting civilians, and says its attacks are designed to weaken Ukraine's military.