SHELTON (AP) — The NAACP says a Connecticut town's school system has failed to adequately respond to several incidents of "racially insensitive" behavior among students.

Recently, a Shelton middle school student appeared in blackface on Snapchat and an 8-year-old black student was spat on while riding the school bus.

Another incident involved a student who spat over a balcony, inadvertently striking a black visitor at the Smithsonian's National Museum of African American History and Culture in Washington.

Shelton Superintendent Christopher Clouet on Wednesday unveiled plans to train teachers and staff "on the complexity of serving a diverse group of students."

Greg Johnson, president of the Ansonia Valley NAACP, says the district's response is a "reactionary and boilerplate diversity plan."

Town Board of Education President Mark Holden said Johnson's criticisms were "out of order."

Information from: Connecticut Post, http://www.connpost.com