nooooo, I wouldn´t...I´m not an "A" mom...so...
I punish them (no tv) for other things...

It takes involvement from both parents. My sons are both "A" student's. I would work with my oldest son on his homework when he was having troubles. I would have different ways to show him how to answer or do the assignments. Giving him more possible ways to think and come up with an answer in ways that he could understand.

And to add that teachers are under-paid. what a crock. If the way they teach is based on the pay they make, then they need go find some other profession to do. It is not how much they make. It is how well they teach.

And the main reason for a child's ability to learn. It comes from the way, and the time you spent with them before they entered school to begin with.

To punish a child because they are not perfect, just shows how ignorant parents really are; take the time to help them find a way to learn.

With my 9 yr old son I found that rewardin for good grades was much more effective than punishin for bad. He has been on the honor roll and superintendent's list for 3 yrs runnin now.
Bein a single parent I don't have alot of money to lavish all the "stuff" on my kids. So instead rewards are usually special outtings. I let him choose from a few different things as to what he'd like to have as his "reward" for good grades. Nine times outta ten he chooses to spend the day at the creek, picnicin, swimmin, and doin what boys do best, huntin critters to take home for Mama.
you just have to find what works best for your child. Each child is different and unique in their own way.