The teachers I know say that they were not taught much about sounds, spellings, morphemes or other linguistic matters that are highly relevant to teaching reading while at university.
This problem applies in the US and around the English-speaking world, as literacy expert Dr Louisa Moats explains in this 160 second video:
Dr Moats is the author of a 40-page, 1999 online article called “Teaching Reading IS Rocket Science – What Expert Teachers of Reading Should Know and Be Able to Do”, which I think remains relevant and interesting.
The article points out that we now know that 95% of children can be taught to read, but there are still far too many struggling readers. It discusses why preventing reading failure has to be a top priority, how well teachers are prepared to teach reading, what preservice and inservice training teachers of reading need, and how she thinks the changes required can be made.
I’ll quote part of her Executive Summary here:
I won’t quote her further because I’m sure by now you just want to click here to download the full article.