Hi Kathleen,
The Checklist activity is not available on a free MoodleCloud site. However, it is available on School sites which your free MoodleCloud site is eligible to upgrade to. See https://www.moodlecloud.com/ for more information or log into your portal and click the 'Change plan' tab.
Many Thanks.
MoodleCloud
Checklist ;plugin' ?
Dán digaštallan lea giddejuvvon, it don sáhte šat vástidit dasa.