"Practitioners use risk assessment information to inform decisions at various points in the criminal justice system. The Primer is written for judges, policy makers, and other practitioners interested in the use of RNA [risk and needs assessment] information at sentencing for the purpose of informing community corrections related decisions regarding management and reduction of offender recidivism risk. It focuses on RNA instruments designed specifically to inform these community corrections-related decisions" (p. 2). This publication explains: what risk and needs assessment instruments are, and reasons for using them; examples of six risk and needs assessment instruments and how they differ; what the qualities of good risk and needs assessment instruments are; the practices which support sound implementation of risk and needs assessment instruments; and the practical considerations in selecting and using risk and needs assessment instruments. An appendix provides profiles of risk and needs assessment instruments.