I'm afraid I'd be lazy and get her behind!
This sounds strange to me. You are spending all this time interacting with the school over your child's grades...even over .1% and you are afraid of being lazy. The choice is yours. You can keep sending you child into an environment that you are convinced is stacked against her...so far you are talking about grades...if you don't trust the teachers to grade her correctly why do you trust them to teach her correctly? The other option could be homeschooling but you are doubting your own ability (”get her behind”). You are your child's PARENT and will be one of the most influential educators your child will ever have if you homeschool or not...trust your ability and your desire to do right by your child.
I have seven children and all have been homeschooled from day one...two have graduated so far and I will tell you from experience that one of the biggest obstacles to overcome for the parent in homeschooling is self doubt. But after watching my children and other homeschooling children in the area grow in maturity compared to other children I am very confident that parents do make the best teachers.