Its all about way and time
Every child needs a different and specific way to absorb the lesson.
There is a child who only once we will immediately remember there is also a need to repeat it
So is the way some children are taught in a special way.
But believe me every child has a special ability Each child is born with their own advantages and disadvantages. But, inevitably you feel panic when your child shows symptoms difficult to read and write, even when he was sitting in elementary school.
A difficult child to read will have many problems because some schools apply the requirement of reading ability before a child is accepted as a student. The child will also have difficulty in understanding the lesson, since almost all subjects are taught in writing.
If the child is difficult to read not get immediate treatment, it is not impossible they still will not be able to read or write to adulthood.
Mistakes spelling, writing letters or not reading quickly cause them to feel disappointed with themselves, inferior and eventually withdraw from the association. 
to learn to teach reading to children I have forgotten the spelling technique.
teach the child to read not by spelling like a conventional way in school that begins the introduction of the name of the letter, then recognize the syllable, then get to know the word, finally the sentence. Teaching a child to read is by introducing a meaningful word and the word is familiar to the child's mind or has often been spoken before 
I like this approach because it fosters creativity in a child to overcome obstacles in new ways. Fantastic post
Thank you