Use Visualization
Teach the child to visualize the words which he studies each day in his spelling lesson. You may not be able to visualize them yourself, but if you have started early in training him, he will have little difficulty in doing so. Exaggeration should be used as an aid in spelling. It will be easier to see the words printed in letters from three to six feet high on the wall of the room, than to see them in pica type on the paper. If your child has difficulty in visualizing the words in the spelling lesson have him exaggerate and color them in his mind's eye picture.
Have the child take a piece of scratch paper and colored crayons and print the difficult words in large letters, using two colors, one for consonants and the other for vowels. If the child has difficulty in learning the sequence of "ie" and "ei" have him follow the plan of using two strong colors, such as red and blue for the two vowels. Have him print all the words with which he has difficulty, using red for the "e" and blue for the "i." This color impression combined with the enlarged letter, will overcome the difficulty.