Repetition is the best way for young children to learn. Until they fully understand the art of concentration, repetition is our best bet. Sooner or later they remember. One day the child can say and sing all of the ABC’s correctly. It just happens one day, after you’ve gone over the alphabet with them hundreds of times.
The next step is for the child to learn the alphabet in and out of sequence. Once the child can identify the ABC’s it’s time to introduce the child to the sounds each alphabet makes. If a child is going to read using phonics this is how it works. They know the different sounds of the alphabet and from that they begin to sound out words. But some children never really get the hang of phonics, at least not well enough to become to become proficient readers. They read by sight or memory.
There is much controversy over the best method to teach a child to read. Without getting
into an educational firestorm, for now, allow your child to do what’s easiest for him. His teacher will help him at school with the methods deemed necessary in that school district, or the policies of the private school. Allowing the child to practice their own method of learning to read, which very well may be memorizing words, won’t harm his or her learning abilities.