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(Story City, IA) -- A teacher under investigation for improperly communicating with students has resigned from the Roland-Story Community School District.
Superintendent Josh Johnson says Cole Carlson resigned instead of being fired.
A media release says Carlson was under investigation for unauthorized and inappropriate social media communication and conduct with students.
He served as a 7th Grade Math and Social Studies teacher at Roland-Story Middle School, according to the district's website.
No criminal charges have been filed yet.