1. During indicates within a period of time.
We slept during the day.
They practiced basketball during the summer.
2. During means at the same time as another event.
I slept during the football game.
They lived in the north during the war.
What IS important is the effort they put in
Making an effort is something your teen CAN do today, getting straight As probably isnt.
Getting your teen to do just half an hour of homework/study each day after school is realistic. Its something that they can complete successfully, and its something that you can reward your teen for doing.