Having other kids is not an excuse. Stop having so many if you can't give them the attention and education they deserve.
Having a job is not an excuse. Set some time to sit and read a goddamn book with your children.
Oh and don't say dad should be helping too. Of course he should. But the majority of the time, moms are the primary care givers in the home, married or not. Take initiative.
If you're too lazy and pitiful to teach your kids then hire someone to do it. And I bet some mothers would rather do that anyway. Smh