The academy's pastor announced Mann's dismissal on Thursday without giving a reason.
On Monday, hundreds of parents and students gathered outside of the school and called for Mann's reinstatement.
Members of the board of trustees told Action News they support Mann and want an explanation of the decision for her termination.
Protesters wore pink- Mann's favorite color.
Dr. Mary McClory, the academy's vice-principal, has been asked to serve as acting Principal.
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