Print the check mark boxes you wish to use on cardstock or print on regular paper and then glue to cardstock. Laminate and cut them out again.
On the back of each checkmark box, place a magnet or a piece of hook-and-loop tape. Have an area with the coordinating hook-and-loop tape or a magnetic surface to organize and the checkmark boxes.
Use the checkmark boxes to indicate completed work on a chart or display board. This can be a whole class chart/schedule/plan or it can be used to individual students.