In the Land of Unlearned Lessons

The protagonist of the story, Vitya Perestukin, is a fourth-grader, a slacker and a poor student for whom homework is sheer torture. And so, one day, as Vitya sat over his hated textbooks, a magical event occurred: he miraculously found himself in the Land of Unlearned Lessons. It was there that the boy had to confront the mistakes he had made while hastily doing his homework. What was Vitya to do? Correct his mistakes, of course! Otherwise, he wouldn't be able to return from this magical land...