Smart Kids are proud to promote the most comprehensive range of Letters and Sounds resources you will find. Many schools have now adopted this high-quality synthetic phonics programme. The six phases of Letters and Sounds are: Phase One: Foundation. Phase Two: First 6 weeks of Year One. Phase Three: Next 12 weeks of Year One. Phase Four: Next 4-6 weeks of Year One. Phase Five: Next 30 weeks of Year One / Two. Phase Six: Year Two and Up.