I myself am recently out if one such Gaelcholáiste and I can tell you with certainty that the level of Irish is atrocious.

The teachers have no interest in using correct or native-like language, and simply spout out the few subject-specific vocabulary they googled on tearma.ie, frequently selecting incorrect terminology (especially Geography and Chemistry in my experience

) and even worse pronunciation

. Btw this was a very well-reputed 2ndary school now, with high grades in JC and LC.
Most teachers have no understanding of Irish grammar beyond an Aimsir Láithreach, Chaite is Fháistineach, yet claim fluency (Abair mé is heard from the younger oidí

). The Modh C could for all the world be nonexistant

It's a real problem, because it encourages the stigma against Irish among students: sure if the teachers themselves can't string a decent sentence together as Gaeilge, what's the point at all?
This sentiment is countrywide and needs to be addressed by training teachers of a higher standard across the board as part of their degrees or hdip shtuff....

This all leads to students who have absolutely no understanding of Irish save the essays they were forced to learn off for exams.....