When I was an elementary school student, I met the kindest teacher.
She is the most hospitable person that I know.= She was the most hospitable person that I knew
She created a comfortable atmosphere for our class. = atmosphere in our classroom
I felt warm and welcomed.

You did a wonderful job expressing your feelings and memories about your teacher. Your sentences are clear and heartfelt. Using words like “kindest,” “hospitable,” and “comfortable atmosphere” shows strong emotional vocabulary. Great work!