Jo Stephenson investigates a campaigning project for parents, run by TreeHouse, which aims to ease the tension. Many parents who have a child with special educational needs (SEN) will tell you they have had to fight all the way to ensure their son or daughter gets a good education. One battleground is the assessment that determines the level of local authority-funded support children get. While not all families have bad experiences, it's clear the system is not working for many, as shown...