Mrs Kennedy
From BRGS Wiki
Mrs Kennedy is a maths teacher and "Head of Year 7".
It was rumoured that she had an affair with another maths teacher, although this was never confirmed.
(student) i dont get it!
(kennedy) then you werent listening then were u?!!?
When she appears to be dazing at the back wall, there are a few George Cloony posters which 'helps her concentration'