CORALVILLE — Over 100 students are in quarantine at Northwest Junior High School after four students and a staff member tested positive for COVID-19.In an email to families Wednesday, Northwest Principal Elizabeth Bruening shared that four students and a staff member tested positive for COVID-19 and were contagious while at school.As of Thursday morning, all schools in the Iowa City Community School District were reporting a total of 91 students and eight staff currently positive for COVID-19, and 325 students and 15 staff in quarantine from exposure.