Mr. Aiken substituted Ms. Clarke in Big Nate: Say Good-Bye To Dork City.
Nate met him right after Nate begged for a really young sub and said Mr. Aiken looks fresh out of college.
However, as the days passed by, Nate started making fun of Mr. Aiken, taking advantage of Aiken's lack of experience. Nate even drew him as a "Dorkosaurus Rex".
- P.S. 38 is the first school he has ever taught at.