More and more teenagers are becoming addicted to gambling. Parents say it often goes undetected.

This illustration shows a teenage boy sitting cross-legged on a bed while holding a cell phone in his hand. There is a mirror behind him and you can see in its reflection that he is gambling. Cards, dice, and poker chips fall with reflections from the sky.

Kim Freudenberg, a longtime teacher in San Francisco, knew that raising her two boys would require many difficult conversations. She warned them about all the common dangers: drugs, alcohol, sex, social media, riding without a helmet. “I never felt the need to say ‘gambling,’” she recalls. One day, when her oldest son was 11, he … Read more