Jill Andersen is an American author and child-development specialist focused on helping tweens and teens (roughly ages 10–17) build practical life skills, emotional resilience, and confidence. Her practical, down-to-earth books include the Street Smart Teen Mastery Handbooks for boys and girls, girls’ workbooks packed with real-life skill challenges, anger-management guides for boys (with versions for girls coming soon), and sports mental-toughness resources. Jill’s work gives parents and young people clear tools to navigate the messy, exciting years of growing up.