These sentences are commonly found on the Internet and in the books...
My mother helped me with homework.
My sister helped me with shopping.
Is it always like that? "....helped [someone] with [something]...
Are these correct?
My sister helped me in (doing) shopping.
There were many options (of whatever) to go for but my mother helped me in selection.
What if my sister has a better tool to unscrew a nut in a robo to dismantle it?
It was very difficult to dismantle the little robo. My sister helped me with a tool and we could do that job easily!
The above sentence uses with but than the context is different!