This is NOT a classroom

Chapter 1
"I like KCF!"
I absolutely hated school and all that came with it; well; that's until I met Mrs A-H. Don't ask me what "A-H" stands for because hard as we tried; she refused to tell us and each time we tried to persist and make her tell us, she gave us this evil look which sent shivers down our spines. When we discovered that the head teacher was dead-scared of her; we gave up trying. Yes, I mean it; the head teacher Mr Oakley was actually scared of Mrs A-H; everyone was scared of Mrs A-H.
I can still remember the first day she came into our classroom. It was a normal Friday morning; the bell had gone but our teacher hadn't arrived so, we were all mocking about. Suddenly, the door flung open and "Hello!" came this massive voice which sounded like a man's with a feminine hint. We all turned in chorus to see this fat lady waddling into our classroom. Normally, we would have burst into laughter but as if we'd all been hypnotised, we said "hello!" in return.
As she settled her big bag with a pile of books on the floor, she said "my name is Mrs A-H and I like KFC chicken." The whole class burst into uncontrollable laugher! She put her hand up and said "can you all be quiet please?" but no one listened. So, after saying it twice without result; she banged her hand on the desk and shouted "SHUUUUTTT up!" and bingo! All went silent. "Good" she said with a nod and a smile and called out the names on the register. Done with it; she wrote the topic "Balanced Diet" on the whiteboard and turned around to face the class.
"Well, today's topic is quite an interesting and important one because as young people, you need to be taught all the good reasons for eating a balanced diet. If you don't, you'll end up looking like me."
We all wanted to burst into laughter again but fear and respect for this crazy teacher restrained us. Turning to the left-side of the room, she pointed at Sam and said "hey boy, what's your n