Onaja Waki (left) is about to start college in California, but she and her mother, Oneida Cordova, have been talking openly for years about the dangers of sexual assault.
Teresa Chin/Youth Radio
Football practice at Castro Valley High School in California. Proper hitting technique requires players to keep their heads up to prevent neck injuries and concussions.
Brett Myers/Youth Radio
A growing number of children are entering puberty at younger ages — sometimes as young as 6 or 7. But in many schools, sex education classes don't begin before the fifth grade.