How to answer this topic better
This topic becomes stronger when you focus on one change the teacher created.
Say who the teacher was, what they did, one specific moment, and the result.
You can record an answer, review the transcript, compare it with a stronger sample answer, and retry the same prompt without losing the main idea.
I want to talk about my English teacher from high school, because she helped me a lot at an important time. She was supportive and patient, and she always tried to make lessons more interesting. One specific thing I remember is that she encouraged me to speak more in class when I was shy and afraid of making mistakes. At first I felt uncomfortable, but over time I became more confident. She influenced me because she changed the way I saw language learning. Instead of treating mistakes as something negative, I started to see them as part of progress.
This answer feels close to Band 6 because it is personal and organized, but it could gain more impact with more natural linking and stronger phrasing.