Some children didn't let her go or teach her to read when she was young. They entered primary school and knew almost nothing. Besides, she didn't distinguish between kindergarten and school at all. Basically, she spent the first semester in kindergarten, and the poor final exam made her realize that going to school is different from going to kindergarten.
In addition, some children are slow to accept, and it takes a long time for her to accept new knowledge, but such a child also has the advantage that once she learns it, she will not forget it easily.
We should not only pay attention to the results, but also find out the reasons. More importantly, we should be patient enough to adapt them to school life and establish good study habits. As long as you are proficient, your grades will naturally improve gradually.