The Checklist block works with the Checklist activity module to provide a quick way for teachers and students to track progress in a whole course or sections of a course. It is a well established and popular block that has been adopted, along with the Checklist activity, as one of the add-ons available with Moodle for School packages.
It relies on the Checklist activity being installed as well and once a checklist has been added, the block can be included in the normal way from the Add block dropdown with editing turned on.
The block can display one checklist or an overview of available checklists. A student will then see their progress in each one and can click one to see more detailed information from the checklist activity.