Mom's math sucks

I have been having many problems getting the old new kid to complete and turn in his homework. Keep in mind that the only reason he gets homework is because he is too busy dinking around in class to get his work done. I have been sending unfinished work home in his homework folder, and it has not been coming back. Finally I decide to call home. I speak with his mother, who is younger then me. She seemed frightened by my call, and I am sure she was so nervous that she flushed everything she had. His mother assured me that the work was at home and it was completed. She would send it to school with her son the next day.

The next day the homework comes in. It is obvious that the mother did it, not her son. It was adult handwriting, which in no way resembles 6 year old tard writing. There is one part of the homework where you have to read short story problems and turn them into a numbers subtraction problem (i.e. Jamie has nine turtles, she gives four to Tom, how many turtles does Jamie now have? The answer would look like
                                                     9
                                                    -4
                                                     5
However, the mom had a different way of writing these problems out. This is exactly how she wrote them out:
        7                   5                     3                     4
     -11                  -9                    -7                   -11  

What a dumb ass. I hung the mom's work on our staff bulletin board, it is that good.