Well, if he is competitive this could help when trying to get good grades. The down side could be that if he fails he may stop trying as if he didn't try, then he would have an excuse if he failed.
It's an issue of motivation. They cannot see the near future and the consequences. It makes me think of the films Back to the Future and the Shawshank Redemption. One went back and kicked their younger selves into action and the other regretted not being able to tell his younger self to act differently.
How do we bring the future to them? Show them their future if they work or not?
I try to do this with mine, to motivate them, but I can't say I'm succeeding that much.
My year 7 son has his end of year tests coming up. He has to revise and is finding it dull. He's not very competitive, so not motivated that way. He asked me to please "punish him" to force him to do it! I'm refusing as I don't believe in punishment! Maybe with time he will be angry with me for not "helping " him in the way he asked me!!!!!
We do have a great relationship so far, but I have puberty to deal with soon.