My current pre-algebra teacher is kinda bad at giving us help. When we ask her to explain something to us, she tells us to look at the board or in our notes. Sometimes thats no help and we actually might need her to work the problem out and show us how to do it again...
There was also a teacher I had in 6th grade year who literally did nothing but play on her computer. We would walk in, she wouldn't say a thing. After about a few minutes of silence she would bluntly tell us our assignment, with barely any instructions. It didn't matter how bad or good we did our work, she would still give us a A, or a B at the least. Everybody had a good grade in her class no matter if they turned in their homework or not.
At least she passed us, so I wasn't complaining.