When aligned with career pathways and other education and training programs in the community, IET programs offered in prisons and jails enable participants to make significant progress toward their education and training goals that can be continued after release. This guide summarizes lessons learned from the IET in Corrections project and serves as a companion to the "IET Design Toolkit". It offers considerations, tools, and examples for planning, designing, implementing, and evaluating IET programs in prisons and jails, designed to supplement the guidance provided in the Toolkit.