Who to Contact if ...

The class has several persons connected with it. For the fastest resolution of most problems, here is a list of problems and who to contact first about them.
If Contact
you have an excused absence for lecture or lab testDr. Keen with your documentation
you know you are going to miss a testDr. Keen
you missed a test unexpectedlyDr. Keen
you find a mistake on your grade records your TA
you have a question about how something was gradedyour TA