Once your child is able to break spoken words into phonemes and syllables, it is time to move onto written letters and words.
Linking Letters to Sounds
Begin by teaching your child what sound each letter makes. It is important they can identify this information in both directions (e.g., being able to point to the letter t when they hear the tuh sound and make the tuh sound when they see the letter t). It is important to note that some letters make more than one sound (e.g., the a in cat versus gate), as there are forty-four phonemes for the twenty-six letters of the alphabet.
Practice
Once your child can link letters to sounds, practice reading simple words, followed by basic sentences. Have your child read aloud so you can offer corrections as needed. To help your child ingrain the words they stumble over, have them write the word as well.
Sight Words
Unfortunately, not every word can be pronounced by simply sounding it out (e.g., two or could). These words have to be memorized and flash cards can help your child with this process. Again, writing out the word as well will further help ingrain it.
Writing
When your child attempts to write new words, encourage invented spelling, attempting to write words as they sound (e.g., kt for cat). You can gradually correct their spelling more as they gain confidence in their abilities.
As your child expands their vocabulary, their motivation for reading will grow. This increased reading naturally leads to an improved vocabulary, resulting in a positive reinforcement cycle.
Reference:
Shaywitz, S., & Shaywitz, J. (2020). Overcoming dyslexia (2nd ed.). New York, NY: Penguin Random House LLC.