Ken Rosa is the art teacher in P.S. 38. Whenever Nate chooses his favorite teacher, it would be Mr. Rosa. This is mostly because Mr. Rosa is too burned out to teach "real" stuff. Mr. Rosa is was one of the major characters back in the 1990s in the Big Nate series. ​Nate has got detention several times from Mr. Rosa. He was Nate's homeroom teacher, but Nate was moved to Mrs. Godfrey's homeroom later on. File:Mr Rosa.png