Does electrical current flow from positive to negative or negative to positive?
In the beginning, before anybody knew about electrons, Benjamin Franklin postulated (guessed) that "electricity", whatever it was, moved from the arbitrarily named positive pole of a battery to the negative, in order to do its work.

We now know better, and when it matters it's taken into account.  

For most work it doesn't matter, so his convention is still followed, and charge flowing from positive to negative is called "conventional current".