Based on years of working with inner-city gangs , church youth groups , high school clubs , youth camps , and families in crisis , PERSON@1 wrote his master 's thesis on a youth program that eventually led to his development of seven principles of life he believed were not optionalWhat PERSON@2 teaches from billgothard.com .

Middle years He worked with gangs , church youth groups , high school clubs , youth camps , and families that had problems .
