Our school uses Grade Books setup by Marking Period, and parents utilize the 'View Grade Detail' function on their students' Progress pages. This allows them to see the Marking Period % of any marking period, yet does not allow us to display a running total (yearlong cumulative numeric average).
The ability to display this to parents (set up with a formula setting to dictate the weight of each marking period over time) would be very useful, as our parents are very interested in this information.
Currently, we must leave grade plans open to do this, so that teachers may calculate a formula periodically to update this information on a report card made just for this purpose.