If older students still have gaps or weaknesses in phonological awareness, is it important to keep revisiting? What could be the impact on their progress if we don’t?

Yes, it is important to address gaps in phonological awareness, but it does depend on where the gap or deficit lies. For example, rhyme wouldn't be your biggest concern, however the skill of oral blending or segmenting can have an impact on the student's ability to read and spell. Phonological awareness, and one of the its sub-skills phonemic awareness, are foundational reading skills. We would suggest...