Effective practices typically evolve over a long period in high-functioning, fully engaged systems. Historically, schools have been confronted with project after project, program after program, initiative after initiative. Many of these aim at addressing learning, behavior, and emotional problems and making schools safe and drug free. This issue of the quarterly newsletter of the Center for Mental Health in Schools includes the following features and regular segments: (1) Evidence-Based Practices in Schools: Concerns about Fit and Implementation; (2) Rebuilding Learning Supports; (3) Policy & Practice: Research-base for a Comprehensive System of Learning Supports; and (4) Do Student Supports Improve Achievement?