Over many years I have participated in a few ski instruction weeks. Each was great and improved my skiing. I participated in a Women's only event at Okemo. Their Ski Sprees are great! 
I also did a week out at Snowmass/Aspen called Breakthrough on Skis:https://www.breakthroughonskis.com/Pages/skicourses.html It was an outstanding experience.
Does anyone have any other experiences that they would recommend?
I also did a week out at Snowmass/Aspen called Breakthrough on Skis:https://www.breakthroughonskis.com/Pages/skicourses.html It was an outstanding experience.

Does anyone have any other experiences that they would recommend?

