Well done if you got the Friends reference in the title 
Just proofreading the school's reading policy. I SHOULD know this but... which sentence is correct?
- For children whom dyslexia is a barrier to their reading progress, we provide extra support...
- For children who dyslexia is a barrier to their reading progress, we provide extra support...
And while we are at it, would you capitalise 'dyslexia' or 'phonics'? I wouldn't, but the policy does at the moment.