The only word needed to turn it all around for Ken

When I was in the 7th grade I had a history teacher that I really liked. I didn’t care much for history but I loved my teacher. His name was Mr. Jarvis. He had so much faith in his students that every Friday when we took our weekly history quiz he let each student grade their own quiz. After we graded the quiz he would then call out our last name and ask for our grade. One by one we would respond in marine-type language. For example, if you got an “A” you said Alpha. “B” was Beta, “C” was Charlie, “D” was Delta and an “F” was Fox.