My teenage son is very good in maths, but he can hardly speak English even though he is now in secondary school. Is that a normal thing?
The answer to your question can be a very simple yes or no, but can also be a lengthy dissertation on learning theory. As often happens in life, the truths must lie somewhere between these two extremes.
A story might be helpful in explaining some aspects of the situation as we understand it.
When in primary school in the 1950s, our teachers routinely set mental arithmetic tests on Friday afternoons. Based on their results, Monday morning saw the clever boys and girls sit on one side of the class, while the rest sat at the other end.
To help those who did not get good grades improve, the teacher used a wooden ruler to hit them on their fingernails.
That done, children who had done well were encouraged to sing (loudly) a song that stated in essence that those children who did badly in class were like frogs. They did not have buttocks and their throats would swell like frogs. The humiliation could not have been more severe.
In tears and discouragement, the children went home to spend yet another weekend in misery, often in the knowledge that the following Friday, a similar fate would visit them.