This is an assessment/ classroom tool for Montessori teachers. There are three sections: one for the teacher to choose work, one for the child to choose work, and one to document actual work done. The teacher and child sit down to discuss what work they will complete. This is done over a span recommended of a week, but I have also done it bi-weekly and monthly. I have also checked off work that I or the child recommended and used the work as a comment section.
In my classroom, each child had a work folder, and this was at the front of the folder that they carried with them throughout the work cycle.