Activity Card Sort, 2nd Edition (ACS) is a flexible and useful measure of occupation that enables occupational therapy practitioners to help clients describe their instrumental, leisure, and social activities. The format's 89 photographs of individuals performing activities and 3 versions of the instrument (Institutional, Recovering, and Community Living) is easily understood and administered. Using the ACS will give clinicians the occupational history and information they need to help clients build routines of meaningful and healthy activities. Includes 20 instrumental activities, 35 low-physical-demand leisure activities, 17 high-physical-demand leisure activities, and 17 social activities and allows for the calculation of the percentage of activity retained.