Learning Centered Technology

Technology for the Educator

Archive for May 2012

BB9 Grade Book Error

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Well the Blackboard bed bugs are at it again, this time in the grade center. Fortunately, we have a simple cure for this particular problem.

Problem: When you go into the full grade center, the grade book will be replaced by the error message:


     TypeError: Unable to get value of the property ‘blank’: object is null or undefined

Fix: To fix this message you should still be able to see the Grade Center Buttons, Create Column, Create Calculated Column, Manage, and Reports.

  • Click on the Manage Button and Column Organization.
  • In the Column Organization window click and drag a couple of the columns around and click submit.

When you return to the grade center, the grade book will reappear. After the reappearance you can go back and reorganize the columns in any order you want without making the grade book disappear.

Oh how I love simple fixes.  🙂


Written by Dr. Sherri E. Ritter

May 22, 2012 at 9:40 am

Top 10 Technology Blogs for Education

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Here is a nice blog concerning educational technologies.


Written by Dr. Sherri E. Ritter

May 16, 2012 at 1:35 pm

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