The best approach to teach reading to any child who has been diagnosed with dyslexia is a multi-sensory approach. Orton-Gillingham is the best approach to teach reading since it is designed to help struggling readers by explicitly teaching the connections between letters and sounds.
Orton-Gillingham is reliable since it is a personalized, sequential, cumulative approach. This approach respects the child's pace to learning and avoids any gaps in the development of language skills by linking each new lesson with the previous one. Each lesson starts with a review of the concepts seen in the last lesson and continues introducing a new concept at a time in order to allow the student to study each concept in depth before moving on to the next.
Students learn by hearing the sounds that make up each word, repeating them, associating them with images and writing them down. This is done by the use of flash cards. These flashcards are a great tool to practice drills in order to memorize each kind of phoneme (letters that make a specific sound) and be able to recognize it in a word when reading a sentence.