This image depicts the interior of a classroom in Dolni Chiflik, Bulgaria, viewed from a student's desk looking towards the front

This image depicts the interior of a classroom in Dolni Chiflik, Bulgaria, viewed from a student's desk looking towards the front. In the immediate foreground, a dark blue bag with a partial white logo is visible on a wooden desk, topped by a clear plastic bottle with a pink cap. The midground features several rows of unoccupied wooden student desks equipped with colorful, stylized plastic chair backs in bright green, yellow, red, and blue, each featuring a central cutout handle. The background is dominated by a large white dry-erase board spanning the front wall. The board displays various mathematical problems and solutions written in black marker, primarily in Bulgarian Cyrillic. Calculations relate to geometric figures, including triangles, angles, and square roots, with specific values such as "a=17cm, b=7cm, c=15√2cm" and "α=45°" present. A light blue plastic water bottle stands on a desk directly in front of the whiteboard. Above the whiteboard, two small, colorful printed notes are affixed to the wall. To the right of the whiteboard, a large, dark gray flat-screen display or interactive board is mounted on a stand. The classroom features light-colored, possibly beige or pale pink, walls and a light-colored ceiling. A rectangular fluorescent light fixture with a grid diffuser is visible on the ceiling. No individuals are present in the scene.