Need for exercises using last session
There's a need for exercises to strengthen not just "words you have learned" (which turned out to include words I knew but certainly hadn't learned from any Duolingo session I'd done when I tried it), but "words from the last session you did". Having just completed a session using words like "riarann", "tairgtear" and something like "seachadatar" - words I've never come across, and which perhaps are part of the newer Irish coming from the Gaelscoileanna (?) - it would have been nice to be able to strengthen these, and the new spellings for words I know. But there seems to be no way to repeat a lesson, or to choose a lesson with the same words?
And they tend not to be repeated in later lessons so they are soon forgotten and by the time you do get them again....you are starting over. I believe there are just way too many words introduced in each lesson. They don't get repeated enough because there are too many of them.