Does every time study participant need to complete training, or only those who are assigned a moment?

CMS requires states to provide mandatory training to all time study participants, not only those who are assigned a random moment. Training may occur before or after staff are selected for inclusion in the time study participant list, but must occur before sampling. 

More information on training for participation in the time study, including what training should involve, when training should be conducted, and what documents should be retained related to training can be found within the Considerations for Developing a Time Study Implementation Plan (TSIP) resource document, available on the CMS School-Based Services Resources page.