"Back in integrity" Correctness

My teacher for my Career and Life Management requires all students who arrive for class late to say the following three sentences in front of the class.

"I would like to get back in integrity. I apologize for being late. I will not do it again."

Obliviously the sentences are constructed poorly. Choppy and short, unnecessarily punctuated when a conjunction would do the job, ect. However what sounds to worst to me is the first sentence, "I would like to get back in integrity." Is the word integrity being used correctly here? It sounds and feels unnatural to say "back in" before integrity, when I always thought integrity was used a noun to describe a quality or human trait. So, by that logic it is not possible to get back into it. Is there any thing grammatically incorrect about that sentence/phrase? Would "I would like to get my integrity back" not be more correct?

Thanks, Cailen.