I have found a motivator!!

Middle Boy wanted to practice driving today after school. 

I told him he could IF all of his homework was done BEFORE 7PM.  He had to go through everything and there could be nothing "he forgot" and had to wrap up later.

He was meticulous.  He had Younger Boy manage Sophie so he could focus.  He poured over his assignment notebook and notebooks to make sure nothing was out of line.

He made it...at 6:47PM.

Praises for a motivator.  I am sure when the novelty wears off he will be less accommodating, but I am going to use it while I've got it.