Maybe you missed the latest news articles on IES website. Well, not to worry. Here are a few links to catch up.
https://engelska.se/news/how-we-ensure-quality-all-ies-schools
https://engelska.se/news/ies-has-high-proportion-qualified-teachers
https://engelska.se/news/97-cent-students-qualified-gymnasiet
Below link will direct you to the news archive at the IES website:
IES website