OH MY what a touchy assignment NEVER EVER would I have felt comfortable with it. I'd be furious. My parents would have been the same as would my entire extended family.
Not sure I'd even be comfortable using a fictious family.
Kind of reminds me of the 2nd grade teacher I had who assigned us all to write the directions to our house said it was important that everyone be able to give directions to house. That I can agree with. The real reason the teacher wanted directions to everyones house was because she also sold World Book encylipidias she spent her Saturday afternoons going knocking on her students doors asking parents to buy. Stressing how important it was for kids to have these books an how much we could learn by reading them not to mention that we could use them for life of course not much was mentioned about the cost of yearly updates etc.
Many yrs later when my DD's was lower grade school my mom got a call from that same teacher she wanted my phone # as she had always like me an liked to stay in touch with some of her students as the reached adulthood so of course mom gave the lady my #.
She called was very interested in what I was doing how many kids I had an ages etc then tried to sell me a brand spanking new set of World Books.
wow, how inappropriate!!!!! I sell children's books and never would've approached any students about them I had co-workers buy from me as I was using several books in my classroom. The year after I left I came back to the school as an educational consultant and did a book fair but not until I was no longer involved in the school