I made a quick video to show you two options for printing the Grade Center.
Method 1: Create a report from within Blackboard's Grade Center
Control Panel > Grade Center > Full Grade Center > Reports > Create Report
Method 2: Download the Grade Center into Excel and print from there
Control Panel > Grade Center > Full Grade Center > Work Offline > Download
View the video at http://screencast.com/t/KTJeKLLAd
There is a little monitor icon in the lower right corner of the video that will make the video show full screen when you click it.