Our school district is very easy to work with.......they are (or were) very accomodating and helpful......there was a little paperwork, such as an affidavit you had to submit stating that you intended to homeschool......and then you also submit a simple statement listing your curriculum...... I did not go into great detail and they accepted it.........
At the end of the year I was given the names of several teachers who evaluate the kids........ I had to submit a very small portfolio of work - beginning, middle and end of year so she could see progress.......and she talked at her kitchen table for a few minutes to the kids........ very casual, asked if they liked PA, asked about friends and play time..... her report read like she had interviewed them for days.......told of their good adjustment to moving 1800 miles from home, said they were friendly and had good skills for getting along with others.......... in short, it was a breeze.......nothing like I expected...........
Good luck - I can't say how any other school district handles things though.........