Naturalistic intervention (NI) originates from applied behavior analysis, which is the use of behavioral techniques to teach learners specific skills. Naturalistic intervention (NI) integrates the principles of applied behavior analysis (ABA) into the natural environment, or into a learner's everyday routines and activities so that the acquired skills may be more easily generalized. This evidence-based practice (EBP) overview on NI includes the following packet components: (1) Overview; (2) Evidence-base; (3) Step-by-Step Guide; (4) Implementation Checklist; (5) Data Collection Sheets; (6) Tip Sheet for Professionals; (7) Parent Guide; (8) Additional Resources; (9) CEC Standards; and (10) Module References. [This brief was co-written by the Autism Focused Intervention Resources and Modules (AFIRM) team.]