Day support may include prevocational activities. The following criteria differentiate between prevocational and vocational services.

- Prevocational services are provided to persons who are not expected to join the general work force or particpant in transitional sheltered workshops within one year of service initiation,

- Services include activites that are not directed at teaching job-specific skills but at underlying habiltative goals (e.g. attention span, motor skills, attendance, and task completion)