Parents see that their child isn't functioning like the others. The child may have few friends, be fearful, tends to stay alone, and seems different.  They cannot figure out the problem.
The teacher may not understand how much the parents provide substantial support so that the child can be successful.
Parents know 
when their
children are having problems.
These difficulties may or may not show up in the classroom and may or may not be recognized by others who have contact with the child. 
 Sometimes the child's school grades may not  be poor but the stress involved at home to help the child achieve those grades is unreasonable and making home life a nightmare!
Children may feel blamed, disappointed in themselves and wrong. They seem to be "always in trouble" and parents feel like they are repeating the same instructions over an over but nothing changes. Parents feel disrespected. They do not know how to bring peace to their household.
What is going on?