Students at Baker Elementary School are taking their principal at his word.
Armando Farias promised his students that if they raised their Academic Perfomance Index (API) scores, he would shave his head.
The students at the Mountain View school made a remarkable 77-point gain this year from 743 to 820 out of 1000. Any score above 800 is considered "excellent" by the state of California.
Friday morning, Farias lathered up and shaved his head, like he promised.
Farias said he has never been bald before, and that he was nervous about the new look. But, he said, it was worth it for his kids, who are like family to him.
Next year, he's aiming for 100 percent -- but he isn't making any more bets until he talks with his wife.
Overall, many schools in San Diego saw a growth in their API scores, including the 900-point winner Scripps Ranch High School.
The API measures academic performance and growth of schools across the state.