Actually I had many, but a particular teacher stood out. In African schools, sticks and canes are always used to impact knowledge and however my English teacher was a lover of the cane, he spoke with his cane, taught noun phrases and adverbial phrases with the use of his cane and as a result of this we hated him.

In the process of getting low grades in my assessment tests I discovered I started hating English language in my high school.

He was my worst teacher too because his class exercises were too much, we wrote so many essay of which he didn't even bother to grade them, he made us work too hard without even grading us, his handwriting was terrible and if we copied the wrong thing he wrote he punished us for it.

It may seems be taught us life lessons that were valuable, but at the high school level which I was, he was our/my worst teacher.