This report examines the use of law enforcement agencies and the juvenile justice system as a double jeopardy mechanism for students, documenting the derailing of students from an academic track in school to a future in the juvenile justice system. The first section explores the emergence of zero tolerance policies and how they have led to the criminalization of student behavior. The second section examines the pervasiveness of zero tolerance policies, analyzing national statistics to document the high numbers of children criminalized by their schools and the disproportionate impact on children of color and children with special needs. The third section discusses the consequences of the schoolhouse to jailhouse track for children in Palm Beach County, Florida, schools. The final section presents proposed changes to these policies that may help keep children away from this track (e.g., schools must cease criminalizing students for trivial behaviors that can be handled by traditional, educationally sound school disciplinary measures; districts should improve collection of arrest/summons data and monitor referrals to law enforcement to root out subjective, unnecessary, and discriminatory referrals; and districts should be sensitive to the experiences of communities of color with law enforcement). Three appendices present the jailhouse track and the law; school level data for Baltimore, Maryland, Houston, Texas, and Palm Beach County, Florida; and diversionary programs. (Contains 63 endnotes.) (SM)