I went through exactly what you are going through and posted here viewtopic.php?f=38&t=13494
You can talk to the teacher about your concerns but in my case if I am honest they did nothing apart from moving her desks. I dont expect anything more but I am self educating my daughter, she goes to school and when she comes home we do work most days as I have lost faith in this school. Most here have been horrified but I say each to their own as I cant simply sit and watch her go down the drain in her current failing school.
Its hard to explain this to those fortunate enough to be in oustanding and good primary schools where their kids are getting first class education already and can do the bare minimum for 11+. She has gone heaps and bounds and the school is taking all the credit now. She has improved and is now on the gifted for maths. The teacher was beaming the other day saying how well she is doing. My opinion is talk to the teacher but at the end of the day she is your child and ONLY you have a genuine interest in her. If you can help her practice at home or improve the areas you feel she is suffering then worth a go. Mine didnt even like reading and now she is crazy about Michael Murpego. This was a girl who hated reading a few months ago so it can be done with a few tears and screaming along the way.