Absent. However, there is change happening. Check out The Diamond Challenge at https://bit.ly/2Y03IzQ. Also, Inc. Magazine published an article in 2017 on the subject. https://bit.ly/2K9hRAt
Ironically, a fellow consultant here on Currnt, @michaelfruhling, is an adjunct professor at Ohio State University and teaches an entrepreneurship course called Venture Lab. However, this is at the collegiate level.
I agree with everyone - they are for the most part absent. I find that as an entrepreneur myself I spend some of my time helping teenagers explore the possibilities of what is available to them if this is something they want to pursue.
I have participated in "shark tank" exercises for a local high school that provides feedback to computer science students that are working to develop various applications. The feedback is to help guide them through more than just the programming of the app. It also focuses on all aspects of business development planning and the product lifecycle.