Parents often say the same thing:
"But they understand everything. Why was the result like this?"
And it’s true. Many teenagers speak reasonably well, understand their teachers, and read simple texts. But during the B1 exam in 9th grade, everything starts to fall apart.
It’s not because the child "knows nothing." More often, it’s due to typical mistakes that went unnoticed for a long time.
Quick Answer
In B1 exams, students most often lose points not because of complex grammar, but due to lack of attention, poor response structure, lack of practice, and stress. This can be fixed in advance.