I agree with what has already been said. It is a joint responsibility.
Additionally, how can you expect a teacher who has 30 something children to look after, to know your child and their needs better than you do? Personally, I love spending that time with my son and am actually looking forward to the whole formal learning process. I think learning whether in primary school or university is very similar. The school introduces the concepts, topics and the 'know how' - you need to go away and learn to use them in a variety of ways so they are relevant to you and your life. I think that is where the parent can play a huge,important role in the learning process.