After class, Ms. Petrova called Denis to her desk. She didn't scold him. Instead, she said, "GDZ is like a map, Denis. It’s helpful if you’re lost, but if you let the map drive the car, you’ll never learn how to get anywhere yourself."
One rainy Tuesday, Denis was staring at a particularly difficult homework assignment on page 84. He was supposed to write a story about his summer holidays using the Present Perfect tense, but he couldn't even remember the difference between "have" and "has."
Denis froze. He hadn't actually read the story; he had only copied it. "Um... some... big birds?" he guessed.