Every year, more than a million U.S. high-school students learn about investing through stock-picking games. But what do these games really teach? WSJ's Jason Zweig explains the shortfalls of traditional stock-market games, and teacher Mike Scanlan describes the different approach his school is taking. Further Reading:  -What Teenagers Really Learn From Stock-Market Games   -Current Baker Scholar and Alumnus Partner to Improve High School Investors Club  Learn more about your ad choices. Visit megaphone.fm/adchoices