Ms. Tetslaff is the gym teacher at Casper High School.
In "Fright Night," she is the teacher that Mr. Lancer is trying to beat in a haunted house competition.
In "Life Lessons," she is the health class teacher that assigns Danny and Valerie as lab partners for their flour-sack baby project.
In "Micro Management," she assigns Dash and Sam to coach Danny and Tucker, respectively, in order to be fit enough to pass gym class.
In "Claw of the Wild," she and Mr. Lancer are the camp counselors.
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