High school students in several Michigan school districts have been arrested by police over the last couple of days after making various threats.  A 17-year old student at Springport High School in Jackson County was arrested Thursday after he allegedly threaten to commit a school shooting. The threat was through a social media account on Wednesday.  Noah Moricz remains at the Jackson County Jail on a 100 thousand dollar bond. He faces a preliminary exam next week on the charges, which includes threat of terrorism. The felony carries a maximum of 20 years in prison.  Meantime, A 16-year-old Chelsea School District student was arrested early this morning (Friday) for allegedly threatening a teacher. The threat was posted on the student's social media site.  The student, who lives in Jackson County's Waterloo Township, was first for a mental health evaluation then to juvenile court. His name was not released.  Three students at Lansing's Everett High School were taken into custody after a brief school wide lockdown on Thursday morning. Police found an airsoft gun in one of the students backpacks. No one was hurt.