We can infer that the author suffers discrimination for being Japanese-American.
The narrator shows that at her new school the teacher was very different from the teacher who taught her at the previous school. The previous teacher was not indifferent, she liked to have contact with her and treated everyone with kindness.
The new teacher, on the other hand, treated her harshly and didn't help her study because he didn't want to have contact with her.
As the narrator showed no signs of hostility towards the teacher, we can consider that she was suffering from xenophobia because she was Japanese-American.
Learn more about xenophobia:
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