Sounds and Spelling of Irish / Fuaimniú agus Litriú na Gaeilge
I came across this wonderful explanation on the general rules and spelling in Irish on YouTube. (Correct me if I'm wrong, it did not come up in any search)
Either way, I believe this may be of aid to a lot of learners.
This video plus her handout have become big favorites of mine.
Broad and Slender
Proof positive that Irish spelling makes sense and is very regular.
And off the topic, here's Karen Reshkin playing Golden Slippers/Redwing on the fiddle.