The Plymouth School Board has officially named replacements for two longtime staff members who’ll be retiring this month. Kyle Coffman was appointed principal of Riverside Intermediate School Tuesday, at the recommendation of Superintendent Andy Hartley. “Mr. Coffman quickly rose to the top of nearly 40 applicants,” Hartley said. “In addition, knowing the work that he has been able to accomplish as a teacher and as an assistant principal in our district, I’m confident in his skill set, attention to detail, compassionate leadership, and a desire to facilitate the success of others, especially our students.”