Effective technical assistance (TA) is a collaborative, coordinated effort to facilitate change in systems, build capacity, improve practices, and reach agreed-upon outcomes1, 2. Specifically, effective TA provides a pathway to improvement through activities and materials that promote new behaviors, practices, beliefs, and understandings of staff in the systems served3. The purpose of this resource is to present the indicators of effective TA practices to facilitate TA provider understanding, use, evaluation, and improvement of those practices.