It probably means just what you think it means: that she is not very much older than the students in her class, and she finds the young man attractive.
She may think he's cute, and may be attracted to him.
That he's really cute, attractive and polite unlike other guys
Her face is probably red because she is super happy that her student is doing wonderful on her tests/quizzes. She's young so she is probably over-joyed that she has become the teacher she had always hoped to be, having her students learn a lot and do well on assignments.
7.1
15-30
There is a possibility, that they are a pedo-bear. Weather they are Male or Female. Watch out. Unless you like older people/teachers.
6:1
A student teacher does not get paid. He or she is enrolled in a university, paying tuition there, but not receiving a salary. It is a mandatory part of teacher training. Many student teachers discover that being in front of a class is not, in fact, what they want to do.
14:1
it means thaat the teacher is pleased with his work. but, other people might think that the teacher wants to date him or something weird like that...
a university is a log with a student on one end and a teacher at the other.
The student-faculty ratio at Brown University is 6:1. This means that for every 6 students, there is 1 faculty member.