Completed tiles are marked with a check while uncompleted tiles will have a progress bar. Any completed but unclaimed tiles will be marked with a prompt to collect the points (which can be done by tapping on it). Tapping on a tile activity will also take you to the place you need to perform the task.
IMPORTANT: If you wish to work on higher level patterns we suggest that you not collect tile points until your pattern is ready to be completed. Full Marks will grant you points for the largest pattern completed and the points for all completed tiles before resetting the board.