Artyom finished his homework in ten minutes. He didn't feel like he had cheated; he felt like someone had finally turned the lights on in a dark room. He closed his textbook, packed his bag, and went to sleep, no longer afraid of the pop quiz waiting for him the next morning.

A student named Artyom sat at his desk, staring at a geometry problem that seemed to be written in a language from another planet. It was Task 4 from the "Didactic Materials for Grade 8" by Merzlyak, and the bisector of the obtuse angle in a parallelogram was currently ruining his life.

The clock read 10:30 PM. The notebook page was a graveyard of erased pencil lines and smudged ink. Artyom knew the property—something about an isosceles triangle being formed—but he couldn't bridge the gap between the rule and the solution.

In a moment of desperation, he reached for his phone and typed the magic words into the search bar: "GDZ geometry 8 didactic materials."