Selecting the "Create Calculated Column" button gives you a number of options.

An "Total Column" will enable you to create a part of your Grade Center that adds upa select number of graded items.

For instance: if your grading scheme in your class was that all your online discussions totaled 600 points...you can create a total column to track how many of these are accummulating over time and by the end of the course.

If you have a Point-based Final Grade system you can use this type of column to simply add up all the available points and compute your final grade!

Selecting the Total Column option will produce a dialogue box like this one.

NOTE: at the bottom of this image you have a selection that says "Primary Display"...you can have BB provide a percentage (of possible points) or a raw score of this average. This can be very useful in providing continual feedback on how a student is doing in the class.

Scrolling down you will find this section in the dialogue box...

At this point the column is set to total ALL your graded columns. If you want to select specific items to be included in this total, select the "Selected Columns and Categories" option.

This opens up the option to select items from the left and insert them into the column on the right.

To do so, simply select the item on the left column and then press the small arrow button to move it over to the right column. Repeat this process until all the items you want totaled together are in the right column.