Phase 4 Blends Workbook - 12 PackLearn to read, write and spell at home or at school, all while having fun! Blends Workbook activities progress week by week around Phase 4 of the Letters & Sounds systematic phonics program. This workbook supports children as they begin to learn the 44 letter sounds of the English language. The Blends Workbook has been designed for 5+ year olds, and is the fourth of six workbooks that together form the Letters & Sounds Workbook program. As your child