It was actively hammering me down to average level as that was easier for her to work with.
I had misforntne to meet her later on in middle school - as she was chemistry, not math, teacher by education. Whole class had failing or almost failing grade with her.
We got better teacher next year who managed to teach us 2 years of chemistry in half a year while also following normal curriculum .. and most of the class actually understood it and had fun with it.
I seriously wonder how many children have been permanently hurt by someone so inept, but well - she was a product of her times(communist occupation).